/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 15:45:53,534 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 15:45:53,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 15:45:53,562 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-21 15:45:53,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-21 15:45:53,563 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-21 15:45:53,564 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-21 15:45:53,570 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-21 15:45:53,572 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-21 15:45:53,575 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-21 15:45:53,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-21 15:45:53,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-21 15:45:53,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-21 15:45:53,580 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-21 15:45:53,581 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-21 15:45:53,582 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-21 15:45:53,584 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-21 15:45:53,585 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-21 15:45:53,587 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-21 15:45:53,591 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-21 15:45:53,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-21 15:45:53,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-21 15:45:53,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-21 15:45:53,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-21 15:45:53,598 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-21 15:45:53,604 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 15:45:53,605 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 15:45:53,605 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 15:45:53,611 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-21 15:45:53,640 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 15:45:53,640 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 15:45:53,641 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 15:45:53,641 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 15:45:53,642 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 15:45:53,642 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 15:45:53,643 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 15:45:53,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 15:45:53,643 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 15:45:53,643 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 15:45:53,643 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 15:45:53,643 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 15:45:53,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 15:45:53,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 15:45:53,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 15:45:53,644 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 15:45:53,644 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 15:45:53,644 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 15:45:53,644 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 15:45:53,644 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 15:45:53,644 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 15:45:53,644 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 15:45:53,644 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 15:45:53,644 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 15:45:53,645 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 15:45:53,645 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 15:45:53,645 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 15:45:53,645 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 15:45:53,645 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 15:45:53,645 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 15:45:53,645 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 15:45:53,645 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 15:45:53,893 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 15:45:53,910 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 15:45:53,911 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 15:45:53,912 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-21 15:45:53,913 INFO L275 PluginConnector]: CDTParser initialized [2021-05-21 15:45:53,914 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2021-05-21 15:45:53,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ec083e0/43ff51e668a14ddeb281ece66fe4114c/FLAG7e2a57b5e [2021-05-21 15:45:54,398 INFO L306 CDTParser]: Found 1 translation units. [2021-05-21 15:45:54,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2021-05-21 15:45:54,413 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ec083e0/43ff51e668a14ddeb281ece66fe4114c/FLAG7e2a57b5e [2021-05-21 15:45:54,429 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10ec083e0/43ff51e668a14ddeb281ece66fe4114c [2021-05-21 15:45:54,431 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 15:45:54,432 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-21 15:45:54,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-21 15:45:54,435 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-21 15:45:54,437 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-21 15:45:54,438 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 03:45:54" (1/1) ... [2021-05-21 15:45:54,439 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22e45ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:45:54, skipping insertion in model container [2021-05-21 15:45:54,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.05 03:45:54" (1/1) ... [2021-05-21 15:45:54,444 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-21 15:45:54,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-21 15:45:54,760 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i[30963,30976] [2021-05-21 15:45:54,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 15:45:54,768 INFO L203 MainTranslator]: Completed pre-run [2021-05-21 15:45:54,798 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i[30963,30976] [2021-05-21 15:45:54,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-21 15:45:54,843 INFO L208 MainTranslator]: Completed translation [2021-05-21 15:45:54,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:45:54 WrapperNode [2021-05-21 15:45:54,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-21 15:45:54,845 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 15:45:54,845 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 15:45:54,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 15:45:54,849 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:45:54" (1/1) ... [2021-05-21 15:45:54,872 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:45:54" (1/1) ... [2021-05-21 15:45:54,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 15:45:54,887 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 15:45:54,887 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 15:45:54,887 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 15:45:54,892 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:45:54" (1/1) ... [2021-05-21 15:45:54,892 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:45:54" (1/1) ... [2021-05-21 15:45:54,896 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:45:54" (1/1) ... [2021-05-21 15:45:54,896 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:45:54" (1/1) ... [2021-05-21 15:45:54,909 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:45:54" (1/1) ... [2021-05-21 15:45:54,912 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:45:54" (1/1) ... [2021-05-21 15:45:54,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:45:54" (1/1) ... [2021-05-21 15:45:54,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 15:45:54,920 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 15:45:54,920 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 15:45:54,921 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 15:45:54,921 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:45:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 15:45:54,968 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-05-21 15:45:54,968 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-05-21 15:45:54,968 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-05-21 15:45:54,969 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-05-21 15:45:54,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-21 15:45:54,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-05-21 15:45:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-21 15:45:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-21 15:45:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-21 15:45:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-05-21 15:45:54,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 15:45:54,971 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 15:45:54,972 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 15:45:55,269 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 15:45:55,269 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-05-21 15:45:55,270 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 03:45:55 BoogieIcfgContainer [2021-05-21 15:45:55,270 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 15:45:55,272 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 15:45:55,272 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 15:45:55,274 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 15:45:55,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.05 03:45:54" (1/3) ... [2021-05-21 15:45:55,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e46532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 03:45:55, skipping insertion in model container [2021-05-21 15:45:55,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.05 03:45:54" (2/3) ... [2021-05-21 15:45:55,275 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@51e46532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 03:45:55, skipping insertion in model container [2021-05-21 15:45:55,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 03:45:55" (3/3) ... [2021-05-21 15:45:55,277 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2021-05-21 15:45:55,281 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 15:45:55,281 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 15:45:55,281 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 15:45:55,282 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 15:45:55,307 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,307 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,307 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,308 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,308 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,308 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,308 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,308 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,308 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,308 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,308 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,309 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,309 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,309 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,309 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,309 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,310 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,310 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,310 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,311 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,311 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,311 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,311 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,314 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,315 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,315 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,315 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,315 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,315 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,316 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,316 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,316 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,316 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,316 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,316 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,317 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,317 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,317 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,317 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,318 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,318 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,318 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,318 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,319 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,319 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,321 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,322 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,322 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,322 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,322 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,324 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,324 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,325 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,325 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,326 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,326 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,326 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,326 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,330 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,330 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,330 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,330 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,330 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,330 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-05-21 15:45:55,331 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-05-21 15:45:55,346 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-21 15:45:55,357 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 15:45:55,358 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 15:45:55,358 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 15:45:55,358 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 15:45:55,358 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 15:45:55,358 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 15:45:55,358 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 15:45:55,358 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 15:45:55,364 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 66 transitions, 142 flow [2021-05-21 15:45:55,424 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:55,428 INFO L276 IsEmpty]: Start isEmpty. Operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:55,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-21 15:45:55,438 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:45:55,438 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:45:55,438 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:45:55,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:45:55,442 INFO L82 PathProgramCache]: Analyzing trace with hash 855509438, now seen corresponding path program 1 times [2021-05-21 15:45:55,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:45:55,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [328135576] [2021-05-21 15:45:55,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:45:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:45:55,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:45:55,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:45:55,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [328135576] [2021-05-21 15:45:55,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [328135576] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:45:55,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:45:55,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 15:45:55,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303323997] [2021-05-21 15:45:55,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 15:45:55,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:45:55,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 15:45:55,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-05-21 15:45:55,747 INFO L87 Difference]: Start difference. First operand has 1680 states, 1678 states have (on average 3.138259833134684) internal successors, (5266), 1679 states have internal predecessors, (5266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:55,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:45:55,983 INFO L93 Difference]: Finished difference Result 3467 states and 10030 transitions. [2021-05-21 15:45:55,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-21 15:45:55,984 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-05-21 15:45:55,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:45:56,001 INFO L225 Difference]: With dead ends: 3467 [2021-05-21 15:45:56,001 INFO L226 Difference]: Without dead ends: 1242 [2021-05-21 15:45:56,002 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:45:56,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-05-21 15:45:56,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 942. [2021-05-21 15:45:56,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 942 states, 941 states have (on average 2.7077577045696066) internal successors, (2548), 941 states have internal predecessors, (2548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:56,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 942 states to 942 states and 2548 transitions. [2021-05-21 15:45:56,062 INFO L78 Accepts]: Start accepts. Automaton has 942 states and 2548 transitions. Word has length 32 [2021-05-21 15:45:56,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:45:56,063 INFO L482 AbstractCegarLoop]: Abstraction has 942 states and 2548 transitions. [2021-05-21 15:45:56,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:56,063 INFO L276 IsEmpty]: Start isEmpty. Operand 942 states and 2548 transitions. [2021-05-21 15:45:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 15:45:56,065 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:45:56,065 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:45:56,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 15:45:56,065 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:45:56,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:45:56,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1720134605, now seen corresponding path program 1 times [2021-05-21 15:45:56,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:45:56,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700575777] [2021-05-21 15:45:56,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:45:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:45:56,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:45:56,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:45:56,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700575777] [2021-05-21 15:45:56,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700575777] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:45:56,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:45:56,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 15:45:56,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360910357] [2021-05-21 15:45:56,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 15:45:56,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:45:56,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 15:45:56,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 15:45:56,125 INFO L87 Difference]: Start difference. First operand 942 states and 2548 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:56,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:45:56,233 INFO L93 Difference]: Finished difference Result 1194 states and 3180 transitions. [2021-05-21 15:45:56,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-21 15:45:56,234 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 15:45:56,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:45:56,239 INFO L225 Difference]: With dead ends: 1194 [2021-05-21 15:45:56,239 INFO L226 Difference]: Without dead ends: 942 [2021-05-21 15:45:56,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-21 15:45:56,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2021-05-21 15:45:56,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 800. [2021-05-21 15:45:56,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 2.728410513141427) internal successors, (2180), 799 states have internal predecessors, (2180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2180 transitions. [2021-05-21 15:45:56,266 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2180 transitions. Word has length 36 [2021-05-21 15:45:56,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:45:56,267 INFO L482 AbstractCegarLoop]: Abstraction has 800 states and 2180 transitions. [2021-05-21 15:45:56,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:56,267 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2180 transitions. [2021-05-21 15:45:56,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-21 15:45:56,268 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:45:56,268 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:45:56,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 15:45:56,269 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:45:56,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:45:56,269 INFO L82 PathProgramCache]: Analyzing trace with hash 2058414913, now seen corresponding path program 1 times [2021-05-21 15:45:56,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:45:56,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470860167] [2021-05-21 15:45:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:45:56,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:45:56,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:45:56,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:45:56,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470860167] [2021-05-21 15:45:56,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470860167] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:45:56,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:45:56,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-21 15:45:56,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627297372] [2021-05-21 15:45:56,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 15:45:56,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:45:56,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 15:45:56,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-21 15:45:56,360 INFO L87 Difference]: Start difference. First operand 800 states and 2180 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:56,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:45:56,454 INFO L93 Difference]: Finished difference Result 1302 states and 3436 transitions. [2021-05-21 15:45:56,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-21 15:45:56,455 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-05-21 15:45:56,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:45:56,458 INFO L225 Difference]: With dead ends: 1302 [2021-05-21 15:45:56,458 INFO L226 Difference]: Without dead ends: 920 [2021-05-21 15:45:56,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 71.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:45:56,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-05-21 15:45:56,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 864. [2021-05-21 15:45:56,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.6882966396292005) internal successors, (2320), 863 states have internal predecessors, (2320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:56,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 2320 transitions. [2021-05-21 15:45:56,476 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 2320 transitions. Word has length 36 [2021-05-21 15:45:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:45:56,476 INFO L482 AbstractCegarLoop]: Abstraction has 864 states and 2320 transitions. [2021-05-21 15:45:56,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:56,476 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 2320 transitions. [2021-05-21 15:45:56,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 15:45:56,479 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:45:56,479 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:45:56,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 15:45:56,479 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:45:56,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:45:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash 307394794, now seen corresponding path program 1 times [2021-05-21 15:45:56,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:45:56,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952914462] [2021-05-21 15:45:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:45:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:45:56,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:45:56,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:45:56,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952914462] [2021-05-21 15:45:56,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952914462] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:45:56,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:45:56,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:45:56,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861556779] [2021-05-21 15:45:56,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:45:56,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:45:56,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:45:56,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:45:56,581 INFO L87 Difference]: Start difference. First operand 864 states and 2320 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:56,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:45:56,700 INFO L93 Difference]: Finished difference Result 1304 states and 3456 transitions. [2021-05-21 15:45:56,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 15:45:56,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-21 15:45:56,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:45:56,707 INFO L225 Difference]: With dead ends: 1304 [2021-05-21 15:45:56,707 INFO L226 Difference]: Without dead ends: 1044 [2021-05-21 15:45:56,711 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:45:56,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-05-21 15:45:56,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 876. [2021-05-21 15:45:56,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 876 states, 875 states have (on average 2.7062857142857144) internal successors, (2368), 875 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:56,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 876 states to 876 states and 2368 transitions. [2021-05-21 15:45:56,727 INFO L78 Accepts]: Start accepts. Automaton has 876 states and 2368 transitions. Word has length 40 [2021-05-21 15:45:56,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:45:56,728 INFO L482 AbstractCegarLoop]: Abstraction has 876 states and 2368 transitions. [2021-05-21 15:45:56,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:56,729 INFO L276 IsEmpty]: Start isEmpty. Operand 876 states and 2368 transitions. [2021-05-21 15:45:56,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 15:45:56,729 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:45:56,730 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:45:56,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-21 15:45:56,730 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:45:56,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:45:56,730 INFO L82 PathProgramCache]: Analyzing trace with hash -258094508, now seen corresponding path program 2 times [2021-05-21 15:45:56,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:45:56,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927552102] [2021-05-21 15:45:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:45:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:45:56,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:45:56,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:45:56,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927552102] [2021-05-21 15:45:56,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927552102] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:45:56,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:45:56,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-21 15:45:56,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327629382] [2021-05-21 15:45:56,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-21 15:45:56,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:45:56,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-21 15:45:56,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-05-21 15:45:56,816 INFO L87 Difference]: Start difference. First operand 876 states and 2368 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:56,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:45:56,904 INFO L93 Difference]: Finished difference Result 1772 states and 4744 transitions. [2021-05-21 15:45:56,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 15:45:56,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-21 15:45:56,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:45:56,909 INFO L225 Difference]: With dead ends: 1772 [2021-05-21 15:45:56,909 INFO L226 Difference]: Without dead ends: 1505 [2021-05-21 15:45:56,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.4ms TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:45:56,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2021-05-21 15:45:56,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 975. [2021-05-21 15:45:56,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.6981519507186857) internal successors, (2628), 974 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:56,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2628 transitions. [2021-05-21 15:45:56,930 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2628 transitions. Word has length 40 [2021-05-21 15:45:56,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:45:56,930 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2628 transitions. [2021-05-21 15:45:56,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:56,930 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2628 transitions. [2021-05-21 15:45:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 15:45:56,931 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:45:56,932 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:45:56,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-21 15:45:56,932 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:45:56,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:45:56,932 INFO L82 PathProgramCache]: Analyzing trace with hash 129784312, now seen corresponding path program 3 times [2021-05-21 15:45:56,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:45:56,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232089421] [2021-05-21 15:45:56,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:45:56,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:45:57,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:45:57,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:45:57,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232089421] [2021-05-21 15:45:57,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232089421] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:45:57,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:45:57,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:45:57,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426467719] [2021-05-21 15:45:57,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:45:57,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:45:57,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:45:57,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:45:57,013 INFO L87 Difference]: Start difference. First operand 975 states and 2628 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:57,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:45:57,082 INFO L93 Difference]: Finished difference Result 2211 states and 5878 transitions. [2021-05-21 15:45:57,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 15:45:57,083 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-21 15:45:57,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:45:57,089 INFO L225 Difference]: With dead ends: 2211 [2021-05-21 15:45:57,090 INFO L226 Difference]: Without dead ends: 1944 [2021-05-21 15:45:57,090 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:45:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2021-05-21 15:45:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1127. [2021-05-21 15:45:57,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1127 states, 1126 states have (on average 2.769982238010657) internal successors, (3119), 1126 states have internal predecessors, (3119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1127 states to 1127 states and 3119 transitions. [2021-05-21 15:45:57,114 INFO L78 Accepts]: Start accepts. Automaton has 1127 states and 3119 transitions. Word has length 40 [2021-05-21 15:45:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:45:57,114 INFO L482 AbstractCegarLoop]: Abstraction has 1127 states and 3119 transitions. [2021-05-21 15:45:57,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:57,115 INFO L276 IsEmpty]: Start isEmpty. Operand 1127 states and 3119 transitions. [2021-05-21 15:45:57,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-21 15:45:57,116 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:45:57,116 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:45:57,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-21 15:45:57,116 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:45:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:45:57,116 INFO L82 PathProgramCache]: Analyzing trace with hash 152127562, now seen corresponding path program 4 times [2021-05-21 15:45:57,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:45:57,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459857630] [2021-05-21 15:45:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:45:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:45:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:45:57,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:45:57,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459857630] [2021-05-21 15:45:57,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459857630] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 15:45:57,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 15:45:57,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-21 15:45:57,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163564598] [2021-05-21 15:45:57,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-21 15:45:57,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:45:57,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-21 15:45:57,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-21 15:45:57,167 INFO L87 Difference]: Start difference. First operand 1127 states and 3119 transitions. Second operand has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:57,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:45:57,286 INFO L93 Difference]: Finished difference Result 1519 states and 4031 transitions. [2021-05-21 15:45:57,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-21 15:45:57,287 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-05-21 15:45:57,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:45:57,291 INFO L225 Difference]: With dead ends: 1519 [2021-05-21 15:45:57,291 INFO L226 Difference]: Without dead ends: 1138 [2021-05-21 15:45:57,291 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:45:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2021-05-21 15:45:57,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 1033. [2021-05-21 15:45:57,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.73546511627907) internal successors, (2823), 1032 states have internal predecessors, (2823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2823 transitions. [2021-05-21 15:45:57,312 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2823 transitions. Word has length 40 [2021-05-21 15:45:57,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:45:57,312 INFO L482 AbstractCegarLoop]: Abstraction has 1033 states and 2823 transitions. [2021-05-21 15:45:57,312 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.714285714285714) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2823 transitions. [2021-05-21 15:45:57,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 15:45:57,314 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:45:57,314 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:45:57,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-21 15:45:57,314 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:45:57,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:45:57,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1301576209, now seen corresponding path program 1 times [2021-05-21 15:45:57,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:45:57,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913636609] [2021-05-21 15:45:57,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:45:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:45:57,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:45:57,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:45:57,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913636609] [2021-05-21 15:45:57,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913636609] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:45:57,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618861555] [2021-05-21 15:45:57,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:45:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:45:57,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 15:45:57,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:45:57,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:45:57,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618861555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:45:57,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:45:57,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 15:45:57,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492535097] [2021-05-21 15:45:57,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 15:45:57,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:45:57,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 15:45:57,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:45:57,649 INFO L87 Difference]: Start difference. First operand 1033 states and 2823 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:57,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:45:57,758 INFO L93 Difference]: Finished difference Result 1451 states and 3787 transitions. [2021-05-21 15:45:57,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-21 15:45:57,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 15:45:57,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:45:57,762 INFO L225 Difference]: With dead ends: 1451 [2021-05-21 15:45:57,762 INFO L226 Difference]: Without dead ends: 1181 [2021-05-21 15:45:57,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:45:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-05-21 15:45:57,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1083. [2021-05-21 15:45:57,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 1082 states have (on average 2.7060998151571165) internal successors, (2928), 1082 states have internal predecessors, (2928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:57,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 2928 transitions. [2021-05-21 15:45:57,782 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 2928 transitions. Word has length 45 [2021-05-21 15:45:57,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:45:57,782 INFO L482 AbstractCegarLoop]: Abstraction has 1083 states and 2928 transitions. [2021-05-21 15:45:57,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:57,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 2928 transitions. [2021-05-21 15:45:57,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 15:45:57,784 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:45:57,784 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:45:57,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-05-21 15:45:57,998 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:45:57,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:45:57,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1689455029, now seen corresponding path program 2 times [2021-05-21 15:45:57,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:45:57,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396504109] [2021-05-21 15:45:57,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:45:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:45:58,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:45:58,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:45:58,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396504109] [2021-05-21 15:45:58,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396504109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:45:58,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468999677] [2021-05-21 15:45:58,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:45:58,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:45:58,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:45:58,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:45:58,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:45:58,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:45:58,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1468999677] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:45:58,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:45:58,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-21 15:45:58,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553827902] [2021-05-21 15:45:58,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 15:45:58,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:45:58,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 15:45:58,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 15:45:58,189 INFO L87 Difference]: Start difference. First operand 1083 states and 2928 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:58,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:45:58,295 INFO L93 Difference]: Finished difference Result 2333 states and 6191 transitions. [2021-05-21 15:45:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 15:45:58,296 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 15:45:58,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:45:58,302 INFO L225 Difference]: With dead ends: 2333 [2021-05-21 15:45:58,302 INFO L226 Difference]: Without dead ends: 2063 [2021-05-21 15:45:58,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:45:58,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-05-21 15:45:58,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1218. [2021-05-21 15:45:58,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 2.7666392769104355) internal successors, (3367), 1217 states have internal predecessors, (3367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:58,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3367 transitions. [2021-05-21 15:45:58,327 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3367 transitions. Word has length 45 [2021-05-21 15:45:58,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:45:58,328 INFO L482 AbstractCegarLoop]: Abstraction has 1218 states and 3367 transitions. [2021-05-21 15:45:58,328 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:58,328 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3367 transitions. [2021-05-21 15:45:58,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 15:45:58,329 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:45:58,329 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:45:58,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:45:58,544 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:45:58,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:45:58,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1711798279, now seen corresponding path program 3 times [2021-05-21 15:45:58,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:45:58,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982222109] [2021-05-21 15:45:58,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:45:58,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:45:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:45:58,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:45:58,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982222109] [2021-05-21 15:45:58,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982222109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:45:58,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484256748] [2021-05-21 15:45:58,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:45:58,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-21 15:45:58,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:45:58,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:45:58,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:45:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:45:58,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484256748] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:45:58,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:45:58,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 15:45:58,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691829260] [2021-05-21 15:45:58,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 15:45:58,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:45:58,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 15:45:58,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:45:58,748 INFO L87 Difference]: Start difference. First operand 1218 states and 3367 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:58,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:45:58,983 INFO L93 Difference]: Finished difference Result 2121 states and 5621 transitions. [2021-05-21 15:45:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:45:58,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 15:45:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:45:58,988 INFO L225 Difference]: With dead ends: 2121 [2021-05-21 15:45:58,988 INFO L226 Difference]: Without dead ends: 1546 [2021-05-21 15:45:58,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:45:58,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2021-05-21 15:45:59,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1253. [2021-05-21 15:45:59,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1253 states, 1252 states have (on average 2.7619808306709266) internal successors, (3458), 1252 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1253 states to 1253 states and 3458 transitions. [2021-05-21 15:45:59,011 INFO L78 Accepts]: Start accepts. Automaton has 1253 states and 3458 transitions. Word has length 45 [2021-05-21 15:45:59,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:45:59,011 INFO L482 AbstractCegarLoop]: Abstraction has 1253 states and 3458 transitions. [2021-05-21 15:45:59,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:59,011 INFO L276 IsEmpty]: Start isEmpty. Operand 1253 states and 3458 transitions. [2021-05-21 15:45:59,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-21 15:45:59,012 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:45:59,013 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:45:59,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-21 15:45:59,228 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:45:59,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:45:59,229 INFO L82 PathProgramCache]: Analyzing trace with hash 315802636, now seen corresponding path program 1 times [2021-05-21 15:45:59,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:45:59,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785292819] [2021-05-21 15:45:59,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:45:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:45:59,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:45:59,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:45:59,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785292819] [2021-05-21 15:45:59,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785292819] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:45:59,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481212826] [2021-05-21 15:45:59,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:45:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:45:59,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-21 15:45:59,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:45:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:45:59,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481212826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:45:59,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:45:59,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-05-21 15:45:59,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751814757] [2021-05-21 15:45:59,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 15:45:59,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:45:59,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 15:45:59,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:45:59,435 INFO L87 Difference]: Start difference. First operand 1253 states and 3458 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:45:59,550 INFO L93 Difference]: Finished difference Result 2398 states and 6444 transitions. [2021-05-21 15:45:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 15:45:59,551 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-05-21 15:45:59,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:45:59,557 INFO L225 Difference]: With dead ends: 2398 [2021-05-21 15:45:59,557 INFO L226 Difference]: Without dead ends: 1926 [2021-05-21 15:45:59,557 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 94.1ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:45:59,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2021-05-21 15:45:59,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1456. [2021-05-21 15:45:59,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 2.727835051546392) internal successors, (3969), 1455 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:59,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 3969 transitions. [2021-05-21 15:45:59,591 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 3969 transitions. Word has length 45 [2021-05-21 15:45:59,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:45:59,591 INFO L482 AbstractCegarLoop]: Abstraction has 1456 states and 3969 transitions. [2021-05-21 15:45:59,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:45:59,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 3969 transitions. [2021-05-21 15:45:59,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:45:59,595 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:45:59,595 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:45:59,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:45:59,810 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:45:59,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:45:59,811 INFO L82 PathProgramCache]: Analyzing trace with hash 456189922, now seen corresponding path program 1 times [2021-05-21 15:45:59,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:45:59,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124065444] [2021-05-21 15:45:59,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:45:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:45:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:45:59,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:45:59,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124065444] [2021-05-21 15:45:59,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124065444] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:45:59,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200033669] [2021-05-21 15:45:59,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:45:59,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:45:59,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:45:59,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:00,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200033669] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:00,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:00,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-21 15:46:00,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616163354] [2021-05-21 15:46:00,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 15:46:00,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:00,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 15:46:00,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:46:00,055 INFO L87 Difference]: Start difference. First operand 1456 states and 3969 transitions. Second operand has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:00,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:00,202 INFO L93 Difference]: Finished difference Result 1866 states and 4917 transitions. [2021-05-21 15:46:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-21 15:46:00,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 15:46:00,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:00,207 INFO L225 Difference]: With dead ends: 1866 [2021-05-21 15:46:00,207 INFO L226 Difference]: Without dead ends: 1596 [2021-05-21 15:46:00,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:46:00,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-05-21 15:46:00,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1531. [2021-05-21 15:46:00,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.6921568627450982) internal successors, (4119), 1530 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:00,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-05-21 15:46:00,229 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-05-21 15:46:00,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:00,230 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-05-21 15:46:00,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.909090909090909) internal successors, (65), 11 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:00,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-05-21 15:46:00,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:46:00,231 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:00,232 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:00,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-21 15:46:00,445 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:00,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:00,445 INFO L82 PathProgramCache]: Analyzing trace with hash 117785766, now seen corresponding path program 2 times [2021-05-21 15:46:00,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:00,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925214460] [2021-05-21 15:46:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:00,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:00,527 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:00,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:00,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925214460] [2021-05-21 15:46:00,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925214460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:00,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232732509] [2021-05-21 15:46:00,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:00,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:46:00,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:00,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:46:00,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:00,698 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:00,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232732509] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:00,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:00,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-05-21 15:46:00,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404428134] [2021-05-21 15:46:00,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 15:46:00,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:00,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 15:46:00,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:46:00,699 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:00,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:00,843 INFO L93 Difference]: Finished difference Result 1981 states and 5147 transitions. [2021-05-21 15:46:00,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:46:00,843 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 15:46:00,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:00,848 INFO L225 Difference]: With dead ends: 1981 [2021-05-21 15:46:00,848 INFO L226 Difference]: Without dead ends: 1711 [2021-05-21 15:46:00,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:46:00,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1711 states. [2021-05-21 15:46:00,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1711 to 1531. [2021-05-21 15:46:00,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1531 states, 1530 states have (on average 2.6921568627450982) internal successors, (4119), 1530 states have internal predecessors, (4119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:00,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1531 states to 1531 states and 4119 transitions. [2021-05-21 15:46:00,871 INFO L78 Accepts]: Start accepts. Automaton has 1531 states and 4119 transitions. Word has length 55 [2021-05-21 15:46:00,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:00,871 INFO L482 AbstractCegarLoop]: Abstraction has 1531 states and 4119 transitions. [2021-05-21 15:46:00,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:00,872 INFO L276 IsEmpty]: Start isEmpty. Operand 1531 states and 4119 transitions. [2021-05-21 15:46:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:46:00,873 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:00,874 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:01,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:01,091 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:01,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:01,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1597456522, now seen corresponding path program 3 times [2021-05-21 15:46:01,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:01,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856778615] [2021-05-21 15:46:01,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:01,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:01,160 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:01,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:01,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856778615] [2021-05-21 15:46:01,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856778615] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:01,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587868847] [2021-05-21 15:46:01,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:01,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:46:01,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:01,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:46:01,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:01,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587868847] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:01,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:01,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-05-21 15:46:01,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957081441] [2021-05-21 15:46:01,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-21 15:46:01,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:01,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-21 15:46:01,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-21 15:46:01,311 INFO L87 Difference]: Start difference. First operand 1531 states and 4119 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:01,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:01,563 INFO L93 Difference]: Finished difference Result 2669 states and 6993 transitions. [2021-05-21 15:46:01,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:46:01,563 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 15:46:01,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:01,567 INFO L225 Difference]: With dead ends: 2669 [2021-05-21 15:46:01,567 INFO L226 Difference]: Without dead ends: 2046 [2021-05-21 15:46:01,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 195.2ms TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:46:01,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-05-21 15:46:01,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1561. [2021-05-21 15:46:01,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1561 states, 1560 states have (on average 2.7205128205128206) internal successors, (4244), 1560 states have internal predecessors, (4244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:01,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1561 states to 1561 states and 4244 transitions. [2021-05-21 15:46:01,592 INFO L78 Accepts]: Start accepts. Automaton has 1561 states and 4244 transitions. Word has length 55 [2021-05-21 15:46:01,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:01,593 INFO L482 AbstractCegarLoop]: Abstraction has 1561 states and 4244 transitions. [2021-05-21 15:46:01,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:01,593 INFO L276 IsEmpty]: Start isEmpty. Operand 1561 states and 4244 transitions. [2021-05-21 15:46:01,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:46:01,594 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:01,594 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:01,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-21 15:46:01,805 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:01,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:01,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1664863172, now seen corresponding path program 4 times [2021-05-21 15:46:01,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:01,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593480539] [2021-05-21 15:46:01,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:01,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:01,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:01,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593480539] [2021-05-21 15:46:01,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593480539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:01,854 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384637437] [2021-05-21 15:46:01,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:01,932 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:46:01,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:01,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:46:01,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:02,019 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:02,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384637437] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:02,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:02,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-05-21 15:46:02,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037708744] [2021-05-21 15:46:02,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 15:46:02,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:02,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 15:46:02,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:46:02,020 INFO L87 Difference]: Start difference. First operand 1561 states and 4244 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:02,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:02,209 INFO L93 Difference]: Finished difference Result 2878 states and 7671 transitions. [2021-05-21 15:46:02,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:46:02,210 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 15:46:02,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:02,214 INFO L225 Difference]: With dead ends: 2878 [2021-05-21 15:46:02,214 INFO L226 Difference]: Without dead ends: 2608 [2021-05-21 15:46:02,214 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:46:02,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2608 states. [2021-05-21 15:46:02,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2608 to 1741. [2021-05-21 15:46:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1741 states, 1740 states have (on average 2.760344827586207) internal successors, (4803), 1740 states have internal predecessors, (4803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:02,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1741 states to 1741 states and 4803 transitions. [2021-05-21 15:46:02,248 INFO L78 Accepts]: Start accepts. Automaton has 1741 states and 4803 transitions. Word has length 55 [2021-05-21 15:46:02,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:02,248 INFO L482 AbstractCegarLoop]: Abstraction has 1741 states and 4803 transitions. [2021-05-21 15:46:02,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:02,248 INFO L276 IsEmpty]: Start isEmpty. Operand 1741 states and 4803 transitions. [2021-05-21 15:46:02,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:46:02,250 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:02,250 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:02,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-21 15:46:02,465 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:02,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:02,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1687206422, now seen corresponding path program 5 times [2021-05-21 15:46:02,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:02,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583283572] [2021-05-21 15:46:02,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:02,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:02,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:02,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583283572] [2021-05-21 15:46:02,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583283572] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:02,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306491946] [2021-05-21 15:46:02,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:02,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 15:46:02,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:02,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:46:02,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:02,652 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:02,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306491946] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:02,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:02,653 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 15:46:02,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764892212] [2021-05-21 15:46:02,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 15:46:02,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:02,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 15:46:02,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:46:02,654 INFO L87 Difference]: Start difference. First operand 1741 states and 4803 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:02,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:02,937 INFO L93 Difference]: Finished difference Result 2821 states and 7531 transitions. [2021-05-21 15:46:02,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:46:02,938 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 15:46:02,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:02,941 INFO L225 Difference]: With dead ends: 2821 [2021-05-21 15:46:02,942 INFO L226 Difference]: Without dead ends: 2246 [2021-05-21 15:46:02,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=206, Invalid=606, Unknown=0, NotChecked=0, Total=812 [2021-05-21 15:46:02,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2246 states. [2021-05-21 15:46:02,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2246 to 1656. [2021-05-21 15:46:02,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 2.730513595166163) internal successors, (4519), 1655 states have internal predecessors, (4519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:02,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 4519 transitions. [2021-05-21 15:46:02,967 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 4519 transitions. Word has length 55 [2021-05-21 15:46:02,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:02,967 INFO L482 AbstractCegarLoop]: Abstraction has 1656 states and 4519 transitions. [2021-05-21 15:46:02,967 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:02,967 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 4519 transitions. [2021-05-21 15:46:02,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:46:02,969 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:02,969 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:03,178 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 15:46:03,179 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:03,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:03,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1535924432, now seen corresponding path program 6 times [2021-05-21 15:46:03,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:03,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659239726] [2021-05-21 15:46:03,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:03,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:03,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:03,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659239726] [2021-05-21 15:46:03,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659239726] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:03,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876470983] [2021-05-21 15:46:03,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:03,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-05-21 15:46:03,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:03,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-21 15:46:03,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:03,432 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:03,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876470983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:03,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:03,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 15:46:03,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016131513] [2021-05-21 15:46:03,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 15:46:03,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:03,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 15:46:03,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:46:03,433 INFO L87 Difference]: Start difference. First operand 1656 states and 4519 transitions. Second operand has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:03,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:03,580 INFO L93 Difference]: Finished difference Result 2561 states and 6649 transitions. [2021-05-21 15:46:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:46:03,581 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 15:46:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:03,584 INFO L225 Difference]: With dead ends: 2561 [2021-05-21 15:46:03,584 INFO L226 Difference]: Without dead ends: 2212 [2021-05-21 15:46:03,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=120, Invalid=342, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:46:03,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-05-21 15:46:03,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 1658. [2021-05-21 15:46:03,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1658 states, 1657 states have (on average 2.7296318648159326) internal successors, (4523), 1657 states have internal predecessors, (4523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:03,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1658 states to 1658 states and 4523 transitions. [2021-05-21 15:46:03,613 INFO L78 Accepts]: Start accepts. Automaton has 1658 states and 4523 transitions. Word has length 55 [2021-05-21 15:46:03,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:03,613 INFO L482 AbstractCegarLoop]: Abstraction has 1658 states and 4523 transitions. [2021-05-21 15:46:03,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 6.916666666666667) internal successors, (83), 12 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:03,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1658 states and 4523 transitions. [2021-05-21 15:46:03,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:46:03,616 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:03,616 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:03,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-21 15:46:03,825 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:03,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:03,825 INFO L82 PathProgramCache]: Analyzing trace with hash 8869516, now seen corresponding path program 7 times [2021-05-21 15:46:03,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:03,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144084145] [2021-05-21 15:46:03,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:03,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:03,885 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:03,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:03,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144084145] [2021-05-21 15:46:03,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144084145] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:03,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634422455] [2021-05-21 15:46:03,886 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:03,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:46:03,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:04,015 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:04,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634422455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:04,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:04,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-05-21 15:46:04,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994415968] [2021-05-21 15:46:04,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-21 15:46:04,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:04,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-21 15:46:04,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-21 15:46:04,016 INFO L87 Difference]: Start difference. First operand 1658 states and 4523 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:04,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:04,102 INFO L93 Difference]: Finished difference Result 2311 states and 5957 transitions. [2021-05-21 15:46:04,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-21 15:46:04,103 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 15:46:04,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:04,106 INFO L225 Difference]: With dead ends: 2311 [2021-05-21 15:46:04,106 INFO L226 Difference]: Without dead ends: 2026 [2021-05-21 15:46:04,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:46:04,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-05-21 15:46:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1638. [2021-05-21 15:46:04,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1638 states, 1637 states have (on average 2.7385461209529627) internal successors, (4483), 1637 states have internal predecessors, (4483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:04,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1638 states to 1638 states and 4483 transitions. [2021-05-21 15:46:04,129 INFO L78 Accepts]: Start accepts. Automaton has 1638 states and 4483 transitions. Word has length 55 [2021-05-21 15:46:04,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:04,129 INFO L482 AbstractCegarLoop]: Abstraction has 1638 states and 4483 transitions. [2021-05-21 15:46:04,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:04,129 INFO L276 IsEmpty]: Start isEmpty. Operand 1638 states and 4483 transitions. [2021-05-21 15:46:04,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:46:04,131 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:04,131 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:04,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:04,347 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:04,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:04,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1697636932, now seen corresponding path program 8 times [2021-05-21 15:46:04,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:04,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15239741] [2021-05-21 15:46:04,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:04,398 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:04,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:04,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15239741] [2021-05-21 15:46:04,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15239741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:04,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736998983] [2021-05-21 15:46:04,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:04,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:46:04,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:04,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 15:46:04,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:04,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:04,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736998983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:04,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:04,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-05-21 15:46:04,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880718735] [2021-05-21 15:46:04,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-21 15:46:04,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:04,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-21 15:46:04,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-21 15:46:04,521 INFO L87 Difference]: Start difference. First operand 1638 states and 4483 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:04,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:04,672 INFO L93 Difference]: Finished difference Result 2246 states and 5827 transitions. [2021-05-21 15:46:04,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:46:04,672 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 15:46:04,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:04,675 INFO L225 Difference]: With dead ends: 2246 [2021-05-21 15:46:04,675 INFO L226 Difference]: Without dead ends: 1961 [2021-05-21 15:46:04,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:46:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-05-21 15:46:04,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1613. [2021-05-21 15:46:04,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 2.75) internal successors, (4433), 1612 states have internal predecessors, (4433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:04,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4433 transitions. [2021-05-21 15:46:04,697 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4433 transitions. Word has length 55 [2021-05-21 15:46:04,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:04,697 INFO L482 AbstractCegarLoop]: Abstraction has 1613 states and 4433 transitions. [2021-05-21 15:46:04,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:04,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4433 transitions. [2021-05-21 15:46:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-21 15:46:04,699 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:04,699 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:04,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:04,913 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:04,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:04,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1496820963, now seen corresponding path program 9 times [2021-05-21 15:46:04,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:04,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672869317] [2021-05-21 15:46:04,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:04,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:04,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:04,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672869317] [2021-05-21 15:46:04,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672869317] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:04,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718186117] [2021-05-21 15:46:04,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:05,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 15:46:05,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:05,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:46:05,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:05,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718186117] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:05,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:05,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-05-21 15:46:05,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244101100] [2021-05-21 15:46:05,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 15:46:05,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:05,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 15:46:05,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:46:05,131 INFO L87 Difference]: Start difference. First operand 1613 states and 4433 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:05,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:05,398 INFO L93 Difference]: Finished difference Result 3288 states and 8870 transitions. [2021-05-21 15:46:05,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:46:05,399 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-05-21 15:46:05,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:05,402 INFO L225 Difference]: With dead ends: 3288 [2021-05-21 15:46:05,402 INFO L226 Difference]: Without dead ends: 2476 [2021-05-21 15:46:05,403 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:46:05,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2476 states. [2021-05-21 15:46:05,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2476 to 1856. [2021-05-21 15:46:05,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1856 states, 1855 states have (on average 2.7326145552560646) internal successors, (5069), 1855 states have internal predecessors, (5069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:05,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1856 states to 1856 states and 5069 transitions. [2021-05-21 15:46:05,436 INFO L78 Accepts]: Start accepts. Automaton has 1856 states and 5069 transitions. Word has length 55 [2021-05-21 15:46:05,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:05,436 INFO L482 AbstractCegarLoop]: Abstraction has 1856 states and 5069 transitions. [2021-05-21 15:46:05,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:05,436 INFO L276 IsEmpty]: Start isEmpty. Operand 1856 states and 5069 transitions. [2021-05-21 15:46:05,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:46:05,438 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:05,439 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:05,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-21 15:46:05,655 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:05,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:05,655 INFO L82 PathProgramCache]: Analyzing trace with hash -2069953421, now seen corresponding path program 10 times [2021-05-21 15:46:05,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:05,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171493435] [2021-05-21 15:46:05,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:05,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:05,748 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:05,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:05,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171493435] [2021-05-21 15:46:05,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171493435] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:05,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991077603] [2021-05-21 15:46:05,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:05,812 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:46:05,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:05,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:46:05,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:05,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991077603] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:05,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:05,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 15:46:05,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727272719] [2021-05-21 15:46:05,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:46:05,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:05,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:46:05,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:46:05,930 INFO L87 Difference]: Start difference. First operand 1856 states and 5069 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:06,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:06,101 INFO L93 Difference]: Finished difference Result 2316 states and 6117 transitions. [2021-05-21 15:46:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 15:46:06,102 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:46:06,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:06,105 INFO L225 Difference]: With dead ends: 2316 [2021-05-21 15:46:06,105 INFO L226 Difference]: Without dead ends: 2046 [2021-05-21 15:46:06,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=150, Invalid=450, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:46:06,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2046 states. [2021-05-21 15:46:06,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2046 to 1931. [2021-05-21 15:46:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:06,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-05-21 15:46:06,129 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-05-21 15:46:06,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:06,130 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-05-21 15:46:06,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:06,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-05-21 15:46:06,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:46:06,133 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:06,133 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:06,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:06,351 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:06,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:06,351 INFO L82 PathProgramCache]: Analyzing trace with hash -423019465, now seen corresponding path program 11 times [2021-05-21 15:46:06,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:06,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655775881] [2021-05-21 15:46:06,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:06,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:06,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:06,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655775881] [2021-05-21 15:46:06,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655775881] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:06,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933689864] [2021-05-21 15:46:06,432 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:06,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 15:46:06,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:06,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:46:06,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:06,573 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:06,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933689864] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:06,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:06,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 15:46:06,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144335253] [2021-05-21 15:46:06,573 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:46:06,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:06,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:46:06,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:46:06,574 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:06,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:06,786 INFO L93 Difference]: Finished difference Result 2481 states and 6447 transitions. [2021-05-21 15:46:06,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:46:06,787 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:46:06,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:06,791 INFO L225 Difference]: With dead ends: 2481 [2021-05-21 15:46:06,791 INFO L226 Difference]: Without dead ends: 2211 [2021-05-21 15:46:06,791 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 174.3ms TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:46:06,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-05-21 15:46:06,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 1931. [2021-05-21 15:46:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:06,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-05-21 15:46:06,814 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-05-21 15:46:06,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:06,814 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-05-21 15:46:06,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:06,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-05-21 15:46:06,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:46:06,817 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:06,817 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:07,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-21 15:46:07,033 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:07,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:07,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1607299847, now seen corresponding path program 12 times [2021-05-21 15:46:07,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:07,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546788737] [2021-05-21 15:46:07,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:07,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:07,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546788737] [2021-05-21 15:46:07,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546788737] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:07,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930753400] [2021-05-21 15:46:07,113 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:07,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 15:46:07,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:07,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:46:07,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:07,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930753400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:07,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:07,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 15:46:07,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702950118] [2021-05-21 15:46:07,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:46:07,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:07,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:46:07,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:46:07,297 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:07,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:07,511 INFO L93 Difference]: Finished difference Result 2566 states and 6617 transitions. [2021-05-21 15:46:07,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:46:07,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:46:07,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:07,514 INFO L225 Difference]: With dead ends: 2566 [2021-05-21 15:46:07,514 INFO L226 Difference]: Without dead ends: 2296 [2021-05-21 15:46:07,514 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 191.7ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:46:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-05-21 15:46:07,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1931. [2021-05-21 15:46:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:07,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-05-21 15:46:07,537 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-05-21 15:46:07,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:07,538 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-05-21 15:46:07,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:07,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-05-21 15:46:07,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:46:07,540 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:07,540 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:07,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:07,755 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:07,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:07,755 INFO L82 PathProgramCache]: Analyzing trace with hash -2073427979, now seen corresponding path program 13 times [2021-05-21 15:46:07,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:07,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251129919] [2021-05-21 15:46:07,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:07,828 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:07,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:07,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251129919] [2021-05-21 15:46:07,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251129919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:07,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660758098] [2021-05-21 15:46:07,829 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:07,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:46:07,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:07,970 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:07,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660758098] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:07,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:07,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 15:46:07,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875984662] [2021-05-21 15:46:07,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:46:07,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:07,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:46:07,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:46:07,971 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:08,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:08,158 INFO L93 Difference]: Finished difference Result 2496 states and 6477 transitions. [2021-05-21 15:46:08,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 15:46:08,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:46:08,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:08,161 INFO L225 Difference]: With dead ends: 2496 [2021-05-21 15:46:08,161 INFO L226 Difference]: Without dead ends: 2226 [2021-05-21 15:46:08,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 162.2ms TimeCoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:46:08,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2226 states. [2021-05-21 15:46:08,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2226 to 1931. [2021-05-21 15:46:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1931 states, 1930 states have (on average 2.704145077720207) internal successors, (5219), 1930 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:08,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1931 states to 1931 states and 5219 transitions. [2021-05-21 15:46:08,185 INFO L78 Accepts]: Start accepts. Automaton has 1931 states and 5219 transitions. Word has length 65 [2021-05-21 15:46:08,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:08,185 INFO L482 AbstractCegarLoop]: Abstraction has 1931 states and 5219 transitions. [2021-05-21 15:46:08,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:08,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1931 states and 5219 transitions. [2021-05-21 15:46:08,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:46:08,188 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:08,188 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:08,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-21 15:46:08,405 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:08,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:08,405 INFO L82 PathProgramCache]: Analyzing trace with hash 506297029, now seen corresponding path program 14 times [2021-05-21 15:46:08,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:08,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26502523] [2021-05-21 15:46:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:08,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:08,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:08,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26502523] [2021-05-21 15:46:08,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26502523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:08,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664465827] [2021-05-21 15:46:08,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:08,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:46:08,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:08,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:46:08,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:08,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664465827] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:08,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:08,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 15:46:08,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777521938] [2021-05-21 15:46:08,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:46:08,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:08,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:46:08,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:46:08,642 INFO L87 Difference]: Start difference. First operand 1931 states and 5219 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:08,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:08,942 INFO L93 Difference]: Finished difference Result 3074 states and 8103 transitions. [2021-05-21 15:46:08,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:46:08,942 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:46:08,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:08,946 INFO L225 Difference]: With dead ends: 3074 [2021-05-21 15:46:08,946 INFO L226 Difference]: Without dead ends: 2451 [2021-05-21 15:46:08,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 247.0ms TimeCoverageRelationStatistics Valid=241, Invalid=751, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:46:08,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-05-21 15:46:08,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 1961. [2021-05-21 15:46:08,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1960 states have (on average 2.726530612244898) internal successors, (5344), 1960 states have internal predecessors, (5344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:08,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 5344 transitions. [2021-05-21 15:46:08,973 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 5344 transitions. Word has length 65 [2021-05-21 15:46:08,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:08,973 INFO L482 AbstractCegarLoop]: Abstraction has 1961 states and 5344 transitions. [2021-05-21 15:46:08,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:08,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 5344 transitions. [2021-05-21 15:46:08,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:46:08,976 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:08,976 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:09,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 15:46:09,193 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:09,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:09,194 INFO L82 PathProgramCache]: Analyzing trace with hash -526350573, now seen corresponding path program 15 times [2021-05-21 15:46:09,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:09,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255034311] [2021-05-21 15:46:09,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:09,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:09,255 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:09,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:09,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255034311] [2021-05-21 15:46:09,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255034311] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:09,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836233940] [2021-05-21 15:46:09,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:09,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 15:46:09,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:09,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:46:09,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:09,394 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:09,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836233940] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:09,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:09,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-21 15:46:09,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324025583] [2021-05-21 15:46:09,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:46:09,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:09,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:46:09,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:46:09,396 INFO L87 Difference]: Start difference. First operand 1961 states and 5344 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:09,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:09,632 INFO L93 Difference]: Finished difference Result 3278 states and 8771 transitions. [2021-05-21 15:46:09,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:46:09,632 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:46:09,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:09,635 INFO L225 Difference]: With dead ends: 3278 [2021-05-21 15:46:09,635 INFO L226 Difference]: Without dead ends: 3008 [2021-05-21 15:46:09,635 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=243, Invalid=627, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:46:09,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-05-21 15:46:09,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 2141. [2021-05-21 15:46:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2141 states, 2140 states have (on average 2.758411214953271) internal successors, (5903), 2140 states have internal predecessors, (5903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:09,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2141 states to 2141 states and 5903 transitions. [2021-05-21 15:46:09,664 INFO L78 Accepts]: Start accepts. Automaton has 2141 states and 5903 transitions. Word has length 65 [2021-05-21 15:46:09,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:09,664 INFO L482 AbstractCegarLoop]: Abstraction has 2141 states and 5903 transitions. [2021-05-21 15:46:09,664 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 13 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:09,664 INFO L276 IsEmpty]: Start isEmpty. Operand 2141 states and 5903 transitions. [2021-05-21 15:46:09,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:46:09,666 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:09,667 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:09,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 15:46:09,881 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:09,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:09,881 INFO L82 PathProgramCache]: Analyzing trace with hash -504007323, now seen corresponding path program 16 times [2021-05-21 15:46:09,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:09,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122072674] [2021-05-21 15:46:09,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:09,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:09,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:09,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122072674] [2021-05-21 15:46:09,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122072674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:09,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059555412] [2021-05-21 15:46:09,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:09,992 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:46:09,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:09,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:46:09,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:10,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059555412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:10,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:10,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 15:46:10,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465644407] [2021-05-21 15:46:10,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:46:10,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:10,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:46:10,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:46:10,117 INFO L87 Difference]: Start difference. First operand 2141 states and 5903 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:10,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:10,470 INFO L93 Difference]: Finished difference Result 3221 states and 8631 transitions. [2021-05-21 15:46:10,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:46:10,471 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:46:10,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:10,473 INFO L225 Difference]: With dead ends: 3221 [2021-05-21 15:46:10,473 INFO L226 Difference]: Without dead ends: 2646 [2021-05-21 15:46:10,474 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 320.4ms TimeCoverageRelationStatistics Valid=300, Invalid=890, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:46:10,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2646 states. [2021-05-21 15:46:10,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2646 to 2056. [2021-05-21 15:46:10,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2056 states, 2055 states have (on average 2.7343065693430657) internal successors, (5619), 2055 states have internal predecessors, (5619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:10,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2056 states to 2056 states and 5619 transitions. [2021-05-21 15:46:10,501 INFO L78 Accepts]: Start accepts. Automaton has 2056 states and 5619 transitions. Word has length 65 [2021-05-21 15:46:10,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:10,501 INFO L482 AbstractCegarLoop]: Abstraction has 2056 states and 5619 transitions. [2021-05-21 15:46:10,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:10,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2056 states and 5619 transitions. [2021-05-21 15:46:10,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:46:10,503 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:10,503 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:10,719 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-05-21 15:46:10,719 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:10,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:10,719 INFO L82 PathProgramCache]: Analyzing trace with hash 211164831, now seen corresponding path program 17 times [2021-05-21 15:46:10,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:10,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462025795] [2021-05-21 15:46:10,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:10,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:10,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:10,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462025795] [2021-05-21 15:46:10,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462025795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:10,793 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996959846] [2021-05-21 15:46:10,793 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:10,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 15:46:10,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:10,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:46:10,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:10,964 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:10,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996959846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:10,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:10,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-05-21 15:46:10,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798871689] [2021-05-21 15:46:10,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:46:10,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:10,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:46:10,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:46:10,965 INFO L87 Difference]: Start difference. First operand 2056 states and 5619 transitions. Second operand has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:11,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:11,136 INFO L93 Difference]: Finished difference Result 3061 states and 7949 transitions. [2021-05-21 15:46:11,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:46:11,136 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:46:11,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:11,139 INFO L225 Difference]: With dead ends: 3061 [2021-05-21 15:46:11,139 INFO L226 Difference]: Without dead ends: 2712 [2021-05-21 15:46:11,139 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 166.9ms TimeCoverageRelationStatistics Valid=182, Invalid=520, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:46:11,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2712 states. [2021-05-21 15:46:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2712 to 2058. [2021-05-21 15:46:11,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2058 states, 2057 states have (on average 2.733592610597958) internal successors, (5623), 2057 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:11,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 5623 transitions. [2021-05-21 15:46:11,164 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 5623 transitions. Word has length 65 [2021-05-21 15:46:11,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:11,164 INFO L482 AbstractCegarLoop]: Abstraction has 2058 states and 5623 transitions. [2021-05-21 15:46:11,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 6.333333333333333) internal successors, (95), 15 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:11,164 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 5623 transitions. [2021-05-21 15:46:11,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:46:11,166 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:11,166 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:11,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-21 15:46:11,382 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:11,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:11,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1649663653, now seen corresponding path program 18 times [2021-05-21 15:46:11,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:11,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381081171] [2021-05-21 15:46:11,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:11,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:11,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381081171] [2021-05-21 15:46:11,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381081171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:11,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453712675] [2021-05-21 15:46:11,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:11,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 15:46:11,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:11,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:46:11,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:11,606 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:11,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453712675] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:11,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:11,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-21 15:46:11,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938689639] [2021-05-21 15:46:11,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 15:46:11,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:11,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 15:46:11,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:46:11,608 INFO L87 Difference]: Start difference. First operand 2058 states and 5623 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:11,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:11,736 INFO L93 Difference]: Finished difference Result 2861 states and 7357 transitions. [2021-05-21 15:46:11,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-21 15:46:11,737 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:46:11,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:11,739 INFO L225 Difference]: With dead ends: 2861 [2021-05-21 15:46:11,739 INFO L226 Difference]: Without dead ends: 2576 [2021-05-21 15:46:11,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:46:11,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2576 states. [2021-05-21 15:46:11,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2576 to 2038. [2021-05-21 15:46:11,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2038 states, 2037 states have (on average 2.74079528718704) internal successors, (5583), 2037 states have internal predecessors, (5583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:11,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2038 states to 2038 states and 5583 transitions. [2021-05-21 15:46:11,763 INFO L78 Accepts]: Start accepts. Automaton has 2038 states and 5583 transitions. Word has length 65 [2021-05-21 15:46:11,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:11,764 INFO L482 AbstractCegarLoop]: Abstraction has 2038 states and 5583 transitions. [2021-05-21 15:46:11,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:11,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2038 states and 5583 transitions. [2021-05-21 15:46:11,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:46:11,765 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:11,766 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:11,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:11,977 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:11,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:11,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1345737589, now seen corresponding path program 19 times [2021-05-21 15:46:11,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:11,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909437593] [2021-05-21 15:46:11,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:11,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:12,053 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:12,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:12,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909437593] [2021-05-21 15:46:12,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909437593] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:12,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848635665] [2021-05-21 15:46:12,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:12,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:46:12,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:12,256 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:12,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848635665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:12,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:12,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-05-21 15:46:12,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761809810] [2021-05-21 15:46:12,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:46:12,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:12,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:46:12,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:46:12,258 INFO L87 Difference]: Start difference. First operand 2038 states and 5583 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:12,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:12,427 INFO L93 Difference]: Finished difference Result 2796 states and 7227 transitions. [2021-05-21 15:46:12,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:46:12,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:46:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:12,430 INFO L225 Difference]: With dead ends: 2796 [2021-05-21 15:46:12,430 INFO L226 Difference]: Without dead ends: 2511 [2021-05-21 15:46:12,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:46:12,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2511 states. [2021-05-21 15:46:12,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2511 to 2013. [2021-05-21 15:46:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 2.75) internal successors, (5533), 2012 states have internal predecessors, (5533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:12,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5533 transitions. [2021-05-21 15:46:12,454 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5533 transitions. Word has length 65 [2021-05-21 15:46:12,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:12,454 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5533 transitions. [2021-05-21 15:46:12,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:12,455 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5533 transitions. [2021-05-21 15:46:12,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:46:12,456 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:12,457 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:12,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-05-21 15:46:12,672 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:12,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:12,672 INFO L82 PathProgramCache]: Analyzing trace with hash -1991900067, now seen corresponding path program 20 times [2021-05-21 15:46:12,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:12,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908155612] [2021-05-21 15:46:12,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:12,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:12,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908155612] [2021-05-21 15:46:12,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908155612] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:12,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544904023] [2021-05-21 15:46:12,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:12,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:46:12,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:12,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-21 15:46:12,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:12,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544904023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:12,866 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:12,866 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-05-21 15:46:12,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880791440] [2021-05-21 15:46:12,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-21 15:46:12,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:12,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-21 15:46:12,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-05-21 15:46:12,867 INFO L87 Difference]: Start difference. First operand 2013 states and 5533 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:13,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:13,007 INFO L93 Difference]: Finished difference Result 2721 states and 7077 transitions. [2021-05-21 15:46:13,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-21 15:46:13,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:46:13,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:13,010 INFO L225 Difference]: With dead ends: 2721 [2021-05-21 15:46:13,010 INFO L226 Difference]: Without dead ends: 2436 [2021-05-21 15:46:13,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:46:13,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2436 states. [2021-05-21 15:46:13,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2436 to 1988. [2021-05-21 15:46:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.7594363361852037) internal successors, (5483), 1987 states have internal predecessors, (5483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:13,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 5483 transitions. [2021-05-21 15:46:13,033 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 5483 transitions. Word has length 65 [2021-05-21 15:46:13,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:13,033 INFO L482 AbstractCegarLoop]: Abstraction has 1988 states and 5483 transitions. [2021-05-21 15:46:13,033 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:13,033 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 5483 transitions. [2021-05-21 15:46:13,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:46:13,035 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:13,035 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:13,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:13,244 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:13,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:13,244 INFO L82 PathProgramCache]: Analyzing trace with hash 596560781, now seen corresponding path program 21 times [2021-05-21 15:46:13,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:13,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250014581] [2021-05-21 15:46:13,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:13,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:13,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:13,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250014581] [2021-05-21 15:46:13,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250014581] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:13,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848743218] [2021-05-21 15:46:13,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:13,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 15:46:13,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:13,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:46:13,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:13,473 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:13,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848743218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:13,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:13,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-05-21 15:46:13,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133238283] [2021-05-21 15:46:13,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:46:13,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:13,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:46:13,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:46:13,474 INFO L87 Difference]: Start difference. First operand 1988 states and 5483 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:13,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:13,672 INFO L93 Difference]: Finished difference Result 2646 states and 6927 transitions. [2021-05-21 15:46:13,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:46:13,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:46:13,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:13,675 INFO L225 Difference]: With dead ends: 2646 [2021-05-21 15:46:13,675 INFO L226 Difference]: Without dead ends: 2361 [2021-05-21 15:46:13,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:46:13,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2361 states. [2021-05-21 15:46:13,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2361 to 1963. [2021-05-21 15:46:13,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1963 states, 1962 states have (on average 2.7691131498470947) internal successors, (5433), 1962 states have internal predecessors, (5433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:13,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1963 states to 1963 states and 5433 transitions. [2021-05-21 15:46:13,698 INFO L78 Accepts]: Start accepts. Automaton has 1963 states and 5433 transitions. Word has length 65 [2021-05-21 15:46:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:13,698 INFO L482 AbstractCegarLoop]: Abstraction has 1963 states and 5433 transitions. [2021-05-21 15:46:13,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1963 states and 5433 transitions. [2021-05-21 15:46:13,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-21 15:46:13,700 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:13,700 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:13,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-21 15:46:13,916 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:13,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:13,916 INFO L82 PathProgramCache]: Analyzing trace with hash 797376750, now seen corresponding path program 22 times [2021-05-21 15:46:13,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:13,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183557507] [2021-05-21 15:46:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:13,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:13,976 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:13,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:13,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183557507] [2021-05-21 15:46:13,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183557507] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:13,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466235162] [2021-05-21 15:46:13,977 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:14,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:46:14,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:14,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-21 15:46:14,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:14,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466235162] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:14,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:14,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-05-21 15:46:14,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170793024] [2021-05-21 15:46:14,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:46:14,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:14,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:46:14,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:46:14,152 INFO L87 Difference]: Start difference. First operand 1963 states and 5433 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:14,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:14,425 INFO L93 Difference]: Finished difference Result 3688 states and 9970 transitions. [2021-05-21 15:46:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:46:14,426 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-05-21 15:46:14,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:14,429 INFO L225 Difference]: With dead ends: 3688 [2021-05-21 15:46:14,429 INFO L226 Difference]: Without dead ends: 2876 [2021-05-21 15:46:14,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 228.5ms TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:46:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2876 states. [2021-05-21 15:46:14,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2876 to 2256. [2021-05-21 15:46:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.73569844789357) internal successors, (6169), 2255 states have internal predecessors, (6169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:14,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 6169 transitions. [2021-05-21 15:46:14,454 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 6169 transitions. Word has length 65 [2021-05-21 15:46:14,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:14,454 INFO L482 AbstractCegarLoop]: Abstraction has 2256 states and 6169 transitions. [2021-05-21 15:46:14,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:14,454 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 6169 transitions. [2021-05-21 15:46:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:14,456 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:14,456 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:14,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-05-21 15:46:14,657 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:14,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:14,657 INFO L82 PathProgramCache]: Analyzing trace with hash -710713404, now seen corresponding path program 23 times [2021-05-21 15:46:14,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:14,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095490009] [2021-05-21 15:46:14,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:14,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:14,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095490009] [2021-05-21 15:46:14,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095490009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:14,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819874363] [2021-05-21 15:46:14,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:14,813 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 15:46:14,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:14,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:46:14,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 1 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:14,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819874363] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:14,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:14,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 15:46:14,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664055960] [2021-05-21 15:46:14,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:46:14,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:14,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:46:14,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:46:14,906 INFO L87 Difference]: Start difference. First operand 2256 states and 6169 transitions. Second operand has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:15,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:15,103 INFO L93 Difference]: Finished difference Result 2766 states and 7317 transitions. [2021-05-21 15:46:15,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:46:15,104 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:15,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:15,106 INFO L225 Difference]: With dead ends: 2766 [2021-05-21 15:46:15,106 INFO L226 Difference]: Without dead ends: 2496 [2021-05-21 15:46:15,106 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:46:15,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2496 states. [2021-05-21 15:46:15,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2496 to 2331. [2021-05-21 15:46:15,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-05-21 15:46:15,128 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-05-21 15:46:15,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:15,128 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-05-21 15:46:15,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.666666666666667) internal successors, (85), 15 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:15,129 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-05-21 15:46:15,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:15,131 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:15,131 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:15,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-21 15:46:15,331 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:15,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:15,332 INFO L82 PathProgramCache]: Analyzing trace with hash 751678088, now seen corresponding path program 24 times [2021-05-21 15:46:15,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:15,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767312741] [2021-05-21 15:46:15,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:15,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:15,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767312741] [2021-05-21 15:46:15,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767312741] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:15,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656264352] [2021-05-21 15:46:15,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:15,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 15:46:15,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:15,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:46:15,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:15,573 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:15,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656264352] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:15,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:15,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-05-21 15:46:15,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446748296] [2021-05-21 15:46:15,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:46:15,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:15,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:46:15,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:46:15,575 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:15,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:15,781 INFO L93 Difference]: Finished difference Result 2981 states and 7747 transitions. [2021-05-21 15:46:15,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:46:15,781 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:15,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:15,784 INFO L225 Difference]: With dead ends: 2981 [2021-05-21 15:46:15,784 INFO L226 Difference]: Without dead ends: 2711 [2021-05-21 15:46:15,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=183, Invalid=573, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:46:15,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-05-21 15:46:15,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2331. [2021-05-21 15:46:15,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:15,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-05-21 15:46:15,826 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-05-21 15:46:15,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:15,827 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-05-21 15:46:15,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:15,827 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-05-21 15:46:15,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:15,829 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:15,829 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:16,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-21 15:46:16,045 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:16,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:16,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1750574424, now seen corresponding path program 25 times [2021-05-21 15:46:16,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:16,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607738184] [2021-05-21 15:46:16,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:16,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:16,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607738184] [2021-05-21 15:46:16,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607738184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:16,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193558676] [2021-05-21 15:46:16,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:16,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:16,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:46:16,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:16,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193558676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:16,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:16,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 15:46:16,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446123988] [2021-05-21 15:46:16,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:46:16,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:16,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:46:16,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:46:16,295 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:16,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:16,526 INFO L93 Difference]: Finished difference Result 3116 states and 8017 transitions. [2021-05-21 15:46:16,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:46:16,526 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:16,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:16,529 INFO L225 Difference]: With dead ends: 3116 [2021-05-21 15:46:16,529 INFO L226 Difference]: Without dead ends: 2846 [2021-05-21 15:46:16,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 211.3ms TimeCoverageRelationStatistics Valid=221, Invalid=709, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:46:16,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2846 states. [2021-05-21 15:46:16,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2846 to 2331. [2021-05-21 15:46:16,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:16,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-05-21 15:46:16,554 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-05-21 15:46:16,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:16,554 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-05-21 15:46:16,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:16,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-05-21 15:46:16,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:16,557 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:16,557 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:16,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-05-21 15:46:16,773 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:16,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:16,773 INFO L82 PathProgramCache]: Analyzing trace with hash -128753466, now seen corresponding path program 26 times [2021-05-21 15:46:16,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:16,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119520918] [2021-05-21 15:46:16,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:16,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:16,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119520918] [2021-05-21 15:46:16,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119520918] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:16,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561765513] [2021-05-21 15:46:16,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:16,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:46:16,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:16,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:46:16,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:17,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561765513] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:17,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:17,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-05-21 15:46:17,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216025328] [2021-05-21 15:46:17,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:46:17,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:17,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:46:17,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:46:17,007 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:17,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:17,234 INFO L93 Difference]: Finished difference Result 3046 states and 7877 transitions. [2021-05-21 15:46:17,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:46:17,234 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:17,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:17,237 INFO L225 Difference]: With dead ends: 3046 [2021-05-21 15:46:17,237 INFO L226 Difference]: Without dead ends: 2776 [2021-05-21 15:46:17,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 193.6ms TimeCoverageRelationStatistics Valid=231, Invalid=699, Unknown=0, NotChecked=0, Total=930 [2021-05-21 15:46:17,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2021-05-21 15:46:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2331. [2021-05-21 15:46:17,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:17,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-05-21 15:46:17,261 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-05-21 15:46:17,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:17,262 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-05-21 15:46:17,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:17,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-05-21 15:46:17,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:17,264 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:17,264 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:17,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:17,470 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:17,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:17,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1901565846, now seen corresponding path program 27 times [2021-05-21 15:46:17,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:17,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070468611] [2021-05-21 15:46:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:17,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:17,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070468611] [2021-05-21 15:46:17,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070468611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:17,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778481291] [2021-05-21 15:46:17,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:17,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 15:46:17,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:17,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:46:17,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:17,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778481291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:17,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:17,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 15:46:17,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869427070] [2021-05-21 15:46:17,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:46:17,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:17,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:46:17,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:46:17,709 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:18,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:18,038 INFO L93 Difference]: Finished difference Result 2971 states and 7727 transitions. [2021-05-21 15:46:18,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:46:18,039 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:18,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:18,041 INFO L225 Difference]: With dead ends: 2971 [2021-05-21 15:46:18,041 INFO L226 Difference]: Without dead ends: 2701 [2021-05-21 15:46:18,042 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 296.4ms TimeCoverageRelationStatistics Valid=247, Invalid=809, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:46:18,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2701 states. [2021-05-21 15:46:18,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2701 to 2331. [2021-05-21 15:46:18,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-05-21 15:46:18,069 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-05-21 15:46:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:18,070 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-05-21 15:46:18,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-05-21 15:46:18,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:18,072 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:18,072 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:18,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-05-21 15:46:18,288 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:18,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:18,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1779161980, now seen corresponding path program 28 times [2021-05-21 15:46:18,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:18,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324961571] [2021-05-21 15:46:18,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:18,369 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:18,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:18,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324961571] [2021-05-21 15:46:18,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324961571] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:18,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473412931] [2021-05-21 15:46:18,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:18,423 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:46:18,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:18,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:46:18,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:18,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473412931] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:18,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:18,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-05-21 15:46:18,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721382355] [2021-05-21 15:46:18,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:46:18,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:18,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:46:18,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:46:18,524 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:18,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:18,762 INFO L93 Difference]: Finished difference Result 2896 states and 7577 transitions. [2021-05-21 15:46:18,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:46:18,763 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:18,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:18,765 INFO L225 Difference]: With dead ends: 2896 [2021-05-21 15:46:18,765 INFO L226 Difference]: Without dead ends: 2626 [2021-05-21 15:46:18,766 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=277, Invalid=779, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:46:18,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2626 states. [2021-05-21 15:46:18,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2626 to 2331. [2021-05-21 15:46:18,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2331 states, 2330 states have (on average 2.7120171673819744) internal successors, (6319), 2330 states have internal predecessors, (6319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:18,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2331 states to 2331 states and 6319 transitions. [2021-05-21 15:46:18,789 INFO L78 Accepts]: Start accepts. Automaton has 2331 states and 6319 transitions. Word has length 75 [2021-05-21 15:46:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:18,789 INFO L482 AbstractCegarLoop]: Abstraction has 2331 states and 6319 transitions. [2021-05-21 15:46:18,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2331 states and 6319 transitions. [2021-05-21 15:46:18,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:18,791 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:18,791 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:19,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-05-21 15:46:19,001 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:19,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:19,001 INFO L82 PathProgramCache]: Analyzing trace with hash 800563028, now seen corresponding path program 29 times [2021-05-21 15:46:19,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:19,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948116976] [2021-05-21 15:46:19,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:19,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:19,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:19,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948116976] [2021-05-21 15:46:19,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948116976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:19,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611333640] [2021-05-21 15:46:19,073 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:19,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 15:46:19,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:19,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:46:19,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:19,223 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:19,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611333640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:19,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:19,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 15:46:19,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758537612] [2021-05-21 15:46:19,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:46:19,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:19,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:46:19,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:46:19,224 INFO L87 Difference]: Start difference. First operand 2331 states and 6319 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:19,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:19,580 INFO L93 Difference]: Finished difference Result 3474 states and 9203 transitions. [2021-05-21 15:46:19,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:46:19,581 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:19,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:19,584 INFO L225 Difference]: With dead ends: 3474 [2021-05-21 15:46:19,584 INFO L226 Difference]: Without dead ends: 2851 [2021-05-21 15:46:19,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 293.9ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:46:19,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2851 states. [2021-05-21 15:46:19,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2851 to 2361. [2021-05-21 15:46:19,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2360 states have (on average 2.730508474576271) internal successors, (6444), 2360 states have internal predecessors, (6444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:19,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 6444 transitions. [2021-05-21 15:46:19,611 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 6444 transitions. Word has length 75 [2021-05-21 15:46:19,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:19,611 INFO L482 AbstractCegarLoop]: Abstraction has 2361 states and 6444 transitions. [2021-05-21 15:46:19,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:19,611 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 6444 transitions. [2021-05-21 15:46:19,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:19,613 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:19,614 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:19,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:19,829 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:19,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:19,829 INFO L82 PathProgramCache]: Analyzing trace with hash -232084574, now seen corresponding path program 30 times [2021-05-21 15:46:19,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:19,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166479174] [2021-05-21 15:46:19,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:19,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:19,901 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:19,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:19,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166479174] [2021-05-21 15:46:19,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166479174] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:19,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041610657] [2021-05-21 15:46:19,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:19,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 15:46:19,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:19,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:46:19,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:20,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041610657] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:20,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:20,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-05-21 15:46:20,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391621004] [2021-05-21 15:46:20,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:46:20,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:20,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:46:20,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:46:20,061 INFO L87 Difference]: Start difference. First operand 2361 states and 6444 transitions. Second operand has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:20,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:20,327 INFO L93 Difference]: Finished difference Result 3678 states and 9871 transitions. [2021-05-21 15:46:20,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:46:20,328 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:20,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:20,331 INFO L225 Difference]: With dead ends: 3678 [2021-05-21 15:46:20,331 INFO L226 Difference]: Without dead ends: 3408 [2021-05-21 15:46:20,332 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 224.5ms TimeCoverageRelationStatistics Valid=340, Invalid=850, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:46:20,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3408 states. [2021-05-21 15:46:20,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3408 to 2541. [2021-05-21 15:46:20,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2541 states, 2540 states have (on average 2.7570866141732284) internal successors, (7003), 2540 states have internal predecessors, (7003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:20,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2541 states to 2541 states and 7003 transitions. [2021-05-21 15:46:20,363 INFO L78 Accepts]: Start accepts. Automaton has 2541 states and 7003 transitions. Word has length 75 [2021-05-21 15:46:20,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:20,363 INFO L482 AbstractCegarLoop]: Abstraction has 2541 states and 7003 transitions. [2021-05-21 15:46:20,363 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.357142857142857) internal successors, (75), 14 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:20,363 INFO L276 IsEmpty]: Start isEmpty. Operand 2541 states and 7003 transitions. [2021-05-21 15:46:20,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:20,365 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:20,366 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:20,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-05-21 15:46:20,581 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:20,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:20,581 INFO L82 PathProgramCache]: Analyzing trace with hash -209741324, now seen corresponding path program 31 times [2021-05-21 15:46:20,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:20,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108772613] [2021-05-21 15:46:20,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:20,660 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:20,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:20,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108772613] [2021-05-21 15:46:20,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108772613] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:20,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699974222] [2021-05-21 15:46:20,661 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:20,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:46:20,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:20,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699974222] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:20,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:20,822 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 15:46:20,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011071551] [2021-05-21 15:46:20,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:46:20,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:20,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:46:20,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:46:20,823 INFO L87 Difference]: Start difference. First operand 2541 states and 7003 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:21,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:21,167 INFO L93 Difference]: Finished difference Result 3125 states and 8491 transitions. [2021-05-21 15:46:21,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:46:21,167 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:21,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:21,170 INFO L225 Difference]: With dead ends: 3125 [2021-05-21 15:46:21,170 INFO L226 Difference]: Without dead ends: 2636 [2021-05-21 15:46:21,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 301.4ms TimeCoverageRelationStatistics Valid=368, Invalid=964, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:46:21,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-05-21 15:46:21,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 2486. [2021-05-21 15:46:21,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2486 states, 2485 states have (on average 2.752112676056338) internal successors, (6839), 2485 states have internal predecessors, (6839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:21,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2486 states to 2486 states and 6839 transitions. [2021-05-21 15:46:21,193 INFO L78 Accepts]: Start accepts. Automaton has 2486 states and 6839 transitions. Word has length 75 [2021-05-21 15:46:21,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:21,193 INFO L482 AbstractCegarLoop]: Abstraction has 2486 states and 6839 transitions. [2021-05-21 15:46:21,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:21,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2486 states and 6839 transitions. [2021-05-21 15:46:21,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:21,195 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:21,195 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:21,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:21,396 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:21,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:21,396 INFO L82 PathProgramCache]: Analyzing trace with hash 685387182, now seen corresponding path program 32 times [2021-05-21 15:46:21,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:21,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671628053] [2021-05-21 15:46:21,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:21,492 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:21,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:21,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671628053] [2021-05-21 15:46:21,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671628053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:21,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247756869] [2021-05-21 15:46:21,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:21,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:46:21,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:21,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-21 15:46:21,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:21,679 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:21,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247756869] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:21,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:21,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-05-21 15:46:21,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739745438] [2021-05-21 15:46:21,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:46:21,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:21,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:46:21,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:46:21,680 INFO L87 Difference]: Start difference. First operand 2486 states and 6839 transitions. Second operand has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:21,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:21,884 INFO L93 Difference]: Finished difference Result 3591 states and 9369 transitions. [2021-05-21 15:46:21,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:46:21,885 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:21,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:21,888 INFO L225 Difference]: With dead ends: 3591 [2021-05-21 15:46:21,888 INFO L226 Difference]: Without dead ends: 3242 [2021-05-21 15:46:21,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 205.8ms TimeCoverageRelationStatistics Valid=220, Invalid=650, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:46:21,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3242 states. [2021-05-21 15:46:21,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3242 to 2488. [2021-05-21 15:46:21,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7515078407720144) internal successors, (6843), 2487 states have internal predecessors, (6843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:21,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6843 transitions. [2021-05-21 15:46:21,917 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6843 transitions. Word has length 75 [2021-05-21 15:46:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:21,917 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6843 transitions. [2021-05-21 15:46:21,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 6.4375) internal successors, (103), 16 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:21,917 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6843 transitions. [2021-05-21 15:46:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:21,920 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:21,920 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:22,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-05-21 15:46:22,130 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:22,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:22,130 INFO L82 PathProgramCache]: Analyzing trace with hash -137824918, now seen corresponding path program 33 times [2021-05-21 15:46:22,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:22,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496771429] [2021-05-21 15:46:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:22,230 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:22,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:22,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496771429] [2021-05-21 15:46:22,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496771429] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:22,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132108693] [2021-05-21 15:46:22,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:22,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 15:46:22,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:22,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:46:22,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:22,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132108693] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:22,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:22,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-05-21 15:46:22,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840052873] [2021-05-21 15:46:22,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:46:22,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:22,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:46:22,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:46:22,385 INFO L87 Difference]: Start difference. First operand 2488 states and 6843 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:22,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:22,509 INFO L93 Difference]: Finished difference Result 3441 states and 8877 transitions. [2021-05-21 15:46:22,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-21 15:46:22,509 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:22,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:22,512 INFO L225 Difference]: With dead ends: 3441 [2021-05-21 15:46:22,512 INFO L226 Difference]: Without dead ends: 3156 [2021-05-21 15:46:22,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:46:22,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3156 states. [2021-05-21 15:46:22,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3156 to 2468. [2021-05-21 15:46:22,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2468 states, 2467 states have (on average 2.7576003242805025) internal successors, (6803), 2467 states have internal predecessors, (6803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:22,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2468 states to 2468 states and 6803 transitions. [2021-05-21 15:46:22,539 INFO L78 Accepts]: Start accepts. Automaton has 2468 states and 6803 transitions. Word has length 75 [2021-05-21 15:46:22,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:22,540 INFO L482 AbstractCegarLoop]: Abstraction has 2468 states and 6803 transitions. [2021-05-21 15:46:22,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:22,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2468 states and 6803 transitions. [2021-05-21 15:46:22,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:22,542 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:22,542 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:22,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-05-21 15:46:22,757 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:22,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:22,758 INFO L82 PathProgramCache]: Analyzing trace with hash -510245734, now seen corresponding path program 34 times [2021-05-21 15:46:22,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:22,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394209842] [2021-05-21 15:46:22,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:22,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:22,839 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:22,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:22,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394209842] [2021-05-21 15:46:22,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394209842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:22,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723246973] [2021-05-21 15:46:22,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:22,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:46:22,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:22,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:46:22,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:22,988 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:22,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723246973] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:22,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:22,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 15:46:22,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526502724] [2021-05-21 15:46:22,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:46:22,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:22,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:46:22,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:46:22,989 INFO L87 Difference]: Start difference. First operand 2468 states and 6803 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:23,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:23,186 INFO L93 Difference]: Finished difference Result 3376 states and 8747 transitions. [2021-05-21 15:46:23,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:46:23,187 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:23,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:23,190 INFO L225 Difference]: With dead ends: 3376 [2021-05-21 15:46:23,190 INFO L226 Difference]: Without dead ends: 3091 [2021-05-21 15:46:23,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 185.4ms TimeCoverageRelationStatistics Valid=185, Invalid=571, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:46:23,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3091 states. [2021-05-21 15:46:23,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3091 to 2443. [2021-05-21 15:46:23,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2443 states, 2442 states have (on average 2.7653562653562656) internal successors, (6753), 2442 states have internal predecessors, (6753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2443 states to 2443 states and 6753 transitions. [2021-05-21 15:46:23,215 INFO L78 Accepts]: Start accepts. Automaton has 2443 states and 6753 transitions. Word has length 75 [2021-05-21 15:46:23,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:23,215 INFO L482 AbstractCegarLoop]: Abstraction has 2443 states and 6753 transitions. [2021-05-21 15:46:23,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:23,215 INFO L276 IsEmpty]: Start isEmpty. Operand 2443 states and 6753 transitions. [2021-05-21 15:46:23,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:23,217 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:23,217 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:23,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-21 15:46:23,418 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:23,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:23,418 INFO L82 PathProgramCache]: Analyzing trace with hash -328434196, now seen corresponding path program 35 times [2021-05-21 15:46:23,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:23,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972112305] [2021-05-21 15:46:23,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:23,490 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:23,491 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:23,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972112305] [2021-05-21 15:46:23,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972112305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:23,491 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520041920] [2021-05-21 15:46:23,491 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:23,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-21 15:46:23,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:23,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:46:23,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:23,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520041920] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:23,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:23,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-05-21 15:46:23,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564878826] [2021-05-21 15:46:23,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:46:23,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:23,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:46:23,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:46:23,621 INFO L87 Difference]: Start difference. First operand 2443 states and 6753 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:23,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:23,794 INFO L93 Difference]: Finished difference Result 3301 states and 8597 transitions. [2021-05-21 15:46:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-21 15:46:23,794 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:23,797 INFO L225 Difference]: With dead ends: 3301 [2021-05-21 15:46:23,797 INFO L226 Difference]: Without dead ends: 3016 [2021-05-21 15:46:23,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 155.3ms TimeCoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:46:23,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2021-05-21 15:46:23,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 2418. [2021-05-21 15:46:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2418 states, 2417 states have (on average 2.7732726520479933) internal successors, (6703), 2417 states have internal predecessors, (6703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:23,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2418 states to 2418 states and 6703 transitions. [2021-05-21 15:46:23,821 INFO L78 Accepts]: Start accepts. Automaton has 2418 states and 6703 transitions. Word has length 75 [2021-05-21 15:46:23,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:23,821 INFO L482 AbstractCegarLoop]: Abstraction has 2418 states and 6703 transitions. [2021-05-21 15:46:23,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:23,822 INFO L276 IsEmpty]: Start isEmpty. Operand 2418 states and 6703 transitions. [2021-05-21 15:46:23,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:23,823 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:23,824 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:24,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-05-21 15:46:24,024 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:24,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:24,025 INFO L82 PathProgramCache]: Analyzing trace with hash -24508132, now seen corresponding path program 36 times [2021-05-21 15:46:24,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:24,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745229627] [2021-05-21 15:46:24,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:24,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:24,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:24,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745229627] [2021-05-21 15:46:24,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745229627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:24,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78377499] [2021-05-21 15:46:24,100 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:24,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-21 15:46:24,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:24,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:46:24,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:24,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78377499] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:24,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:24,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 15:46:24,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180761168] [2021-05-21 15:46:24,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:46:24,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:24,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:46:24,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:46:24,250 INFO L87 Difference]: Start difference. First operand 2418 states and 6703 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:24,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:24,494 INFO L93 Difference]: Finished difference Result 3226 states and 8447 transitions. [2021-05-21 15:46:24,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:46:24,495 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:24,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:24,498 INFO L225 Difference]: With dead ends: 3226 [2021-05-21 15:46:24,498 INFO L226 Difference]: Without dead ends: 2941 [2021-05-21 15:46:24,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 207.3ms TimeCoverageRelationStatistics Valid=210, Invalid=660, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:46:24,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2941 states. [2021-05-21 15:46:24,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2941 to 2393. [2021-05-21 15:46:24,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2393 states, 2392 states have (on average 2.7813545150501673) internal successors, (6653), 2392 states have internal predecessors, (6653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2393 states to 2393 states and 6653 transitions. [2021-05-21 15:46:24,521 INFO L78 Accepts]: Start accepts. Automaton has 2393 states and 6653 transitions. Word has length 75 [2021-05-21 15:46:24,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:24,521 INFO L482 AbstractCegarLoop]: Abstraction has 2393 states and 6653 transitions. [2021-05-21 15:46:24,521 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:24,521 INFO L276 IsEmpty]: Start isEmpty. Operand 2393 states and 6653 transitions. [2021-05-21 15:46:24,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:24,523 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:24,523 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:24,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:24,729 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:24,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:24,729 INFO L82 PathProgramCache]: Analyzing trace with hash -670670610, now seen corresponding path program 37 times [2021-05-21 15:46:24,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:24,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493225120] [2021-05-21 15:46:24,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:24,812 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:24,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:24,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493225120] [2021-05-21 15:46:24,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493225120] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:24,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261604732] [2021-05-21 15:46:24,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:24,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:24,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:46:24,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:24,951 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:24,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261604732] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:24,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:24,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-05-21 15:46:24,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224430140] [2021-05-21 15:46:24,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-21 15:46:24,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:24,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-21 15:46:24,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-21 15:46:24,952 INFO L87 Difference]: Start difference. First operand 2393 states and 6653 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:25,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:25,144 INFO L93 Difference]: Finished difference Result 3151 states and 8297 transitions. [2021-05-21 15:46:25,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 15:46:25,144 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:25,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:25,147 INFO L225 Difference]: With dead ends: 3151 [2021-05-21 15:46:25,147 INFO L226 Difference]: Without dead ends: 2866 [2021-05-21 15:46:25,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:46:25,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2866 states. [2021-05-21 15:46:25,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2866 to 2368. [2021-05-21 15:46:25,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2368 states, 2367 states have (on average 2.7896070975918885) internal successors, (6603), 2367 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:25,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2368 states to 2368 states and 6603 transitions. [2021-05-21 15:46:25,171 INFO L78 Accepts]: Start accepts. Automaton has 2368 states and 6603 transitions. Word has length 75 [2021-05-21 15:46:25,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:25,171 INFO L482 AbstractCegarLoop]: Abstraction has 2368 states and 6603 transitions. [2021-05-21 15:46:25,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 13 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:25,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2368 states and 6603 transitions. [2021-05-21 15:46:25,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:25,172 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:25,173 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:25,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-21 15:46:25,377 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:25,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:25,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1917790238, now seen corresponding path program 38 times [2021-05-21 15:46:25,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:25,378 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652287958] [2021-05-21 15:46:25,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:25,448 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:25,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:25,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652287958] [2021-05-21 15:46:25,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652287958] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:25,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470261641] [2021-05-21 15:46:25,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:25,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:46:25,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:25,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-21 15:46:25,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:25,594 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 15:46:25,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470261641] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:25,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:25,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-21 15:46:25,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656845088] [2021-05-21 15:46:25,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-21 15:46:25,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:25,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-21 15:46:25,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-05-21 15:46:25,595 INFO L87 Difference]: Start difference. First operand 2368 states and 6603 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:25,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:25,869 INFO L93 Difference]: Finished difference Result 3076 states and 8147 transitions. [2021-05-21 15:46:25,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:46:25,869 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:25,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:25,872 INFO L225 Difference]: With dead ends: 3076 [2021-05-21 15:46:25,872 INFO L226 Difference]: Without dead ends: 2791 [2021-05-21 15:46:25,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=251, Invalid=741, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:46:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-05-21 15:46:25,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2343. [2021-05-21 15:46:25,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 2342 states have (on average 2.7980358667805296) internal successors, (6553), 2342 states have internal predecessors, (6553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:25,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 6553 transitions. [2021-05-21 15:46:25,895 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 6553 transitions. Word has length 75 [2021-05-21 15:46:25,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:25,895 INFO L482 AbstractCegarLoop]: Abstraction has 2343 states and 6553 transitions. [2021-05-21 15:46:25,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:25,895 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 6553 transitions. [2021-05-21 15:46:25,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-21 15:46:25,896 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:25,897 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:26,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:26,097 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:26,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash 2118606207, now seen corresponding path program 39 times [2021-05-21 15:46:26,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:26,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732964987] [2021-05-21 15:46:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:26,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:26,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732964987] [2021-05-21 15:46:26,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732964987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:26,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226512100] [2021-05-21 15:46:26,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:26,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-21 15:46:26,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:26,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:46:26,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:26,322 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:26,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226512100] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:26,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:26,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-21 15:46:26,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861422047] [2021-05-21 15:46:26,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:46:26,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:26,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:46:26,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:46:26,323 INFO L87 Difference]: Start difference. First operand 2343 states and 6553 transitions. Second operand has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:26,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:26,721 INFO L93 Difference]: Finished difference Result 3365 states and 9139 transitions. [2021-05-21 15:46:26,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:46:26,722 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-05-21 15:46:26,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:26,724 INFO L225 Difference]: With dead ends: 3365 [2021-05-21 15:46:26,724 INFO L226 Difference]: Without dead ends: 2756 [2021-05-21 15:46:26,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 311.5ms TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:46:26,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2756 states. [2021-05-21 15:46:26,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2756 to 1634. [2021-05-21 15:46:26,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1634 states, 1633 states have (on average 2.7348438456827924) internal successors, (4466), 1633 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:26,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1634 states to 1634 states and 4466 transitions. [2021-05-21 15:46:26,746 INFO L78 Accepts]: Start accepts. Automaton has 1634 states and 4466 transitions. Word has length 75 [2021-05-21 15:46:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:26,747 INFO L482 AbstractCegarLoop]: Abstraction has 1634 states and 4466 transitions. [2021-05-21 15:46:26,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.133333333333334) internal successors, (77), 15 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:26,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1634 states and 4466 transitions. [2021-05-21 15:46:26,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:46:26,748 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:26,748 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:26,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:26,964 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:26,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:26,964 INFO L82 PathProgramCache]: Analyzing trace with hash 452139800, now seen corresponding path program 40 times [2021-05-21 15:46:26,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:26,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956552252] [2021-05-21 15:46:26,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:27,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:27,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956552252] [2021-05-21 15:46:27,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956552252] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:27,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872379646] [2021-05-21 15:46:27,071 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:27,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:46:27,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:27,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:46:27,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:27,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872379646] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:27,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:27,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-05-21 15:46:27,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559175254] [2021-05-21 15:46:27,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:27,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:27,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:27,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:27,276 INFO L87 Difference]: Start difference. First operand 1634 states and 4466 transitions. Second operand has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:27,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:27,515 INFO L93 Difference]: Finished difference Result 2524 states and 6566 transitions. [2021-05-21 15:46:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:46:27,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:46:27,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:27,519 INFO L225 Difference]: With dead ends: 2524 [2021-05-21 15:46:27,519 INFO L226 Difference]: Without dead ends: 2190 [2021-05-21 15:46:27,519 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 241.6ms TimeCoverageRelationStatistics Valid=285, Invalid=837, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:46:27,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2190 states. [2021-05-21 15:46:27,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2190 to 1719. [2021-05-21 15:46:27,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1719 states, 1718 states have (on average 2.6984866123399303) internal successors, (4636), 1718 states have internal predecessors, (4636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:27,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1719 states to 1719 states and 4636 transitions. [2021-05-21 15:46:27,538 INFO L78 Accepts]: Start accepts. Automaton has 1719 states and 4636 transitions. Word has length 80 [2021-05-21 15:46:27,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:27,538 INFO L482 AbstractCegarLoop]: Abstraction has 1719 states and 4636 transitions. [2021-05-21 15:46:27,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 6.0) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:27,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1719 states and 4636 transitions. [2021-05-21 15:46:27,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:46:27,539 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:27,539 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:27,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-05-21 15:46:27,740 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:27,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:27,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1173866716, now seen corresponding path program 41 times [2021-05-21 15:46:27,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:27,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410708243] [2021-05-21 15:46:27,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:27,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:27,836 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:27,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:27,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410708243] [2021-05-21 15:46:27,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410708243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:27,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458155787] [2021-05-21 15:46:27,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:27,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 15:46:27,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:27,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:46:27,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:27,995 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:27,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458155787] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:27,996 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:27,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-05-21 15:46:27,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399152377] [2021-05-21 15:46:27,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:46:27,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:27,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:46:27,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:46:27,997 INFO L87 Difference]: Start difference. First operand 1719 states and 4636 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:28,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:28,166 INFO L93 Difference]: Finished difference Result 2946 states and 7347 transitions. [2021-05-21 15:46:28,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-21 15:46:28,166 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:46:28,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:28,169 INFO L225 Difference]: With dead ends: 2946 [2021-05-21 15:46:28,169 INFO L226 Difference]: Without dead ends: 2676 [2021-05-21 15:46:28,169 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 175.3ms TimeCoverageRelationStatistics Valid=196, Invalid=560, Unknown=0, NotChecked=0, Total=756 [2021-05-21 15:46:28,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2676 states. [2021-05-21 15:46:28,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2676 to 1863. [2021-05-21 15:46:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.71374865735768) internal successors, (5053), 1862 states have internal predecessors, (5053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:28,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 5053 transitions. [2021-05-21 15:46:28,189 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 5053 transitions. Word has length 80 [2021-05-21 15:46:28,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:28,189 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 5053 transitions. [2021-05-21 15:46:28,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:28,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 5053 transitions. [2021-05-21 15:46:28,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:46:28,191 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:28,191 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:28,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:28,391 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:28,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:28,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1794345044, now seen corresponding path program 42 times [2021-05-21 15:46:28,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:28,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593695353] [2021-05-21 15:46:28,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:28,494 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:28,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:28,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593695353] [2021-05-21 15:46:28,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593695353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:28,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536958078] [2021-05-21 15:46:28,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:28,551 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 15:46:28,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:28,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:46:28,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:28,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536958078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:28,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:28,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 15:46:28,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106054511] [2021-05-21 15:46:28,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:46:28,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:28,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:46:28,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:46:28,655 INFO L87 Difference]: Start difference. First operand 1863 states and 5053 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:28,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:28,892 INFO L93 Difference]: Finished difference Result 2906 states and 7342 transitions. [2021-05-21 15:46:28,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:46:28,892 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:46:28,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:28,895 INFO L225 Difference]: With dead ends: 2906 [2021-05-21 15:46:28,895 INFO L226 Difference]: Without dead ends: 2636 [2021-05-21 15:46:28,895 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=243, Invalid=749, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:46:28,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2636 states. [2021-05-21 15:46:28,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2636 to 1938. [2021-05-21 15:46:28,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1938 states, 1937 states have (on average 2.7248322147651005) internal successors, (5278), 1937 states have internal predecessors, (5278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:28,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1938 states to 1938 states and 5278 transitions. [2021-05-21 15:46:28,914 INFO L78 Accepts]: Start accepts. Automaton has 1938 states and 5278 transitions. Word has length 80 [2021-05-21 15:46:28,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:28,914 INFO L482 AbstractCegarLoop]: Abstraction has 1938 states and 5278 transitions. [2021-05-21 15:46:28,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:28,914 INFO L276 IsEmpty]: Start isEmpty. Operand 1938 states and 5278 transitions. [2021-05-21 15:46:28,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:46:28,915 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:28,916 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:29,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-21 15:46:29,121 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:29,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:29,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1340128870, now seen corresponding path program 43 times [2021-05-21 15:46:29,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:29,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345161441] [2021-05-21 15:46:29,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:29,214 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:29,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:29,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345161441] [2021-05-21 15:46:29,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345161441] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:29,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226672633] [2021-05-21 15:46:29,215 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:29,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:29,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:46:29,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:29,349 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:29,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226672633] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:29,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:29,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-05-21 15:46:29,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844128991] [2021-05-21 15:46:29,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:46:29,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:29,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:46:29,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:46:29,350 INFO L87 Difference]: Start difference. First operand 1938 states and 5278 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:29,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:29,544 INFO L93 Difference]: Finished difference Result 2956 states and 7517 transitions. [2021-05-21 15:46:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-21 15:46:29,545 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:46:29,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:29,547 INFO L225 Difference]: With dead ends: 2956 [2021-05-21 15:46:29,547 INFO L226 Difference]: Without dead ends: 2686 [2021-05-21 15:46:29,548 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2021-05-21 15:46:29,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2686 states. [2021-05-21 15:46:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2686 to 2013. [2021-05-21 15:46:29,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2013 states, 2012 states have (on average 2.735089463220676) internal successors, (5503), 2012 states have internal predecessors, (5503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:29,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2013 states to 2013 states and 5503 transitions. [2021-05-21 15:46:29,569 INFO L78 Accepts]: Start accepts. Automaton has 2013 states and 5503 transitions. Word has length 80 [2021-05-21 15:46:29,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:29,569 INFO L482 AbstractCegarLoop]: Abstraction has 2013 states and 5503 transitions. [2021-05-21 15:46:29,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:29,569 INFO L276 IsEmpty]: Start isEmpty. Operand 2013 states and 5503 transitions. [2021-05-21 15:46:29,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:46:29,570 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:29,570 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:29,771 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:29,771 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:29,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:29,771 INFO L82 PathProgramCache]: Analyzing trace with hash -341232534, now seen corresponding path program 44 times [2021-05-21 15:46:29,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:29,772 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601908223] [2021-05-21 15:46:29,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:29,867 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:29,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:29,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601908223] [2021-05-21 15:46:29,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601908223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:29,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090401987] [2021-05-21 15:46:29,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:29,919 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:46:29,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:29,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:46:29,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:30,028 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:30,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090401987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:30,028 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:30,028 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 15:46:30,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131660710] [2021-05-21 15:46:30,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:46:30,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:30,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:46:30,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:46:30,029 INFO L87 Difference]: Start difference. First operand 2013 states and 5503 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:30,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:30,305 INFO L93 Difference]: Finished difference Result 2981 states and 7642 transitions. [2021-05-21 15:46:30,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:46:30,306 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:46:30,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:30,308 INFO L225 Difference]: With dead ends: 2981 [2021-05-21 15:46:30,308 INFO L226 Difference]: Without dead ends: 2711 [2021-05-21 15:46:30,308 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:46:30,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-05-21 15:46:30,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2088. [2021-05-21 15:46:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2088 states, 2087 states have (on average 2.744609487302348) internal successors, (5728), 2087 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:30,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 5728 transitions. [2021-05-21 15:46:30,334 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 5728 transitions. Word has length 80 [2021-05-21 15:46:30,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:30,335 INFO L482 AbstractCegarLoop]: Abstraction has 2088 states and 5728 transitions. [2021-05-21 15:46:30,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:30,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 5728 transitions. [2021-05-21 15:46:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:46:30,336 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:30,336 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:30,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-05-21 15:46:30,545 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:30,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:30,545 INFO L82 PathProgramCache]: Analyzing trace with hash 2074406872, now seen corresponding path program 45 times [2021-05-21 15:46:30,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:30,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892453587] [2021-05-21 15:46:30,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:30,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:30,632 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:30,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:30,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892453587] [2021-05-21 15:46:30,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892453587] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:30,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886577359] [2021-05-21 15:46:30,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:30,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 15:46:30,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:30,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:46:30,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:30,769 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:30,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886577359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:30,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:30,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-05-21 15:46:30,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026780730] [2021-05-21 15:46:30,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:46:30,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:30,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:46:30,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:46:30,771 INFO L87 Difference]: Start difference. First operand 2088 states and 5728 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:31,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:31,009 INFO L93 Difference]: Finished difference Result 3006 states and 7767 transitions. [2021-05-21 15:46:31,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:46:31,010 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:46:31,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:31,012 INFO L225 Difference]: With dead ends: 3006 [2021-05-21 15:46:31,012 INFO L226 Difference]: Without dead ends: 2736 [2021-05-21 15:46:31,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-05-21 15:46:31,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2736 states. [2021-05-21 15:46:31,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2736 to 2163. [2021-05-21 15:46:31,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 2.7534690101757633) internal successors, (5953), 2162 states have internal predecessors, (5953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:31,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 5953 transitions. [2021-05-21 15:46:31,035 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 5953 transitions. Word has length 80 [2021-05-21 15:46:31,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:31,035 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 5953 transitions. [2021-05-21 15:46:31,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:31,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 5953 transitions. [2021-05-21 15:46:31,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:46:31,036 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:31,036 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:31,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-05-21 15:46:31,237 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:31,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:31,237 INFO L82 PathProgramCache]: Analyzing trace with hash -190241112, now seen corresponding path program 46 times [2021-05-21 15:46:31,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:31,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366770218] [2021-05-21 15:46:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:31,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:31,325 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:31,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:31,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366770218] [2021-05-21 15:46:31,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366770218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:31,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108482019] [2021-05-21 15:46:31,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:31,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:46:31,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:31,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:46:31,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:31,474 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:31,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108482019] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:31,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:31,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 15:46:31,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149086621] [2021-05-21 15:46:31,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:46:31,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:31,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:46:31,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:46:31,476 INFO L87 Difference]: Start difference. First operand 2163 states and 5953 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:31,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:31,808 INFO L93 Difference]: Finished difference Result 3031 states and 7892 transitions. [2021-05-21 15:46:31,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:46:31,809 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:46:31,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:31,811 INFO L225 Difference]: With dead ends: 3031 [2021-05-21 15:46:31,811 INFO L226 Difference]: Without dead ends: 2761 [2021-05-21 15:46:31,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 290.3ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:46:31,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2761 states. [2021-05-21 15:46:31,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2761 to 2238. [2021-05-21 15:46:31,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2238 states, 2237 states have (on average 2.761734465802414) internal successors, (6178), 2237 states have internal predecessors, (6178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2238 states to 2238 states and 6178 transitions. [2021-05-21 15:46:31,835 INFO L78 Accepts]: Start accepts. Automaton has 2238 states and 6178 transitions. Word has length 80 [2021-05-21 15:46:31,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:31,835 INFO L482 AbstractCegarLoop]: Abstraction has 2238 states and 6178 transitions. [2021-05-21 15:46:31,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:31,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2238 states and 6178 transitions. [2021-05-21 15:46:31,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:46:31,837 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:31,837 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:32,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-21 15:46:32,049 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:32,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:32,049 INFO L82 PathProgramCache]: Analyzing trace with hash 423998358, now seen corresponding path program 47 times [2021-05-21 15:46:32,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:32,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425228875] [2021-05-21 15:46:32,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:32,129 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:32,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:32,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425228875] [2021-05-21 15:46:32,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425228875] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:32,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185291834] [2021-05-21 15:46:32,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:32,197 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 15:46:32,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:32,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:46:32,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:32,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185291834] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:32,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:32,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-05-21 15:46:32,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752512445] [2021-05-21 15:46:32,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:46:32,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:32,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:46:32,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:46:32,283 INFO L87 Difference]: Start difference. First operand 2238 states and 6178 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:32,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:32,550 INFO L93 Difference]: Finished difference Result 3056 states and 8017 transitions. [2021-05-21 15:46:32,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:46:32,550 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:46:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:32,553 INFO L225 Difference]: With dead ends: 3056 [2021-05-21 15:46:32,553 INFO L226 Difference]: Without dead ends: 2786 [2021-05-21 15:46:32,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 233.7ms TimeCoverageRelationStatistics Valid=289, Invalid=833, Unknown=0, NotChecked=0, Total=1122 [2021-05-21 15:46:32,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-05-21 15:46:32,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2313. [2021-05-21 15:46:32,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2312 states have (on average 2.769463667820069) internal successors, (6403), 2312 states have internal predecessors, (6403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:32,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 6403 transitions. [2021-05-21 15:46:32,577 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 6403 transitions. Word has length 80 [2021-05-21 15:46:32,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:32,577 INFO L482 AbstractCegarLoop]: Abstraction has 2313 states and 6403 transitions. [2021-05-21 15:46:32,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:32,577 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 6403 transitions. [2021-05-21 15:46:32,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:46:32,578 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:32,579 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:32,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-05-21 15:46:32,779 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:32,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:32,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1291243930, now seen corresponding path program 48 times [2021-05-21 15:46:32,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:32,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321253084] [2021-05-21 15:46:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:32,875 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:32,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321253084] [2021-05-21 15:46:32,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321253084] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:32,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595860832] [2021-05-21 15:46:32,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:32,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 15:46:32,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:32,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:46:32,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:33,032 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:33,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595860832] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:33,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:33,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-05-21 15:46:33,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990093496] [2021-05-21 15:46:33,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 15:46:33,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:33,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 15:46:33,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-21 15:46:33,033 INFO L87 Difference]: Start difference. First operand 2313 states and 6403 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:33,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:33,381 INFO L93 Difference]: Finished difference Result 3141 states and 8307 transitions. [2021-05-21 15:46:33,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:46:33,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:46:33,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:33,384 INFO L225 Difference]: With dead ends: 3141 [2021-05-21 15:46:33,385 INFO L226 Difference]: Without dead ends: 2871 [2021-05-21 15:46:33,385 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 304.7ms TimeCoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:46:33,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2871 states. [2021-05-21 15:46:33,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2871 to 2388. [2021-05-21 15:46:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.785085881860075) internal successors, (6648), 2387 states have internal predecessors, (6648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:33,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6648 transitions. [2021-05-21 15:46:33,412 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6648 transitions. Word has length 80 [2021-05-21 15:46:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:33,412 INFO L482 AbstractCegarLoop]: Abstraction has 2388 states and 6648 transitions. [2021-05-21 15:46:33,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6648 transitions. [2021-05-21 15:46:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:46:33,414 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:33,414 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:33,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:33,630 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:33,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:33,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1971075764, now seen corresponding path program 49 times [2021-05-21 15:46:33,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:33,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213577139] [2021-05-21 15:46:33,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:33,709 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:33,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:33,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213577139] [2021-05-21 15:46:33,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213577139] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:33,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549755579] [2021-05-21 15:46:33,709 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:33,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-21 15:46:33,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:33,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549755579] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:33,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:33,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-05-21 15:46:33,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135210387] [2021-05-21 15:46:33,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-21 15:46:33,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:33,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-21 15:46:33,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-21 15:46:33,856 INFO L87 Difference]: Start difference. First operand 2388 states and 6648 transitions. Second operand has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:34,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:34,161 INFO L93 Difference]: Finished difference Result 3908 states and 10481 transitions. [2021-05-21 15:46:34,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:46:34,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:46:34,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:34,165 INFO L225 Difference]: With dead ends: 3908 [2021-05-21 15:46:34,165 INFO L226 Difference]: Without dead ends: 3638 [2021-05-21 15:46:34,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:46:34,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3638 states. [2021-05-21 15:46:34,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3638 to 2568. [2021-05-21 15:46:34,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2568 states, 2567 states have (on average 2.8075574600701207) internal successors, (7207), 2567 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 7207 transitions. [2021-05-21 15:46:34,194 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 7207 transitions. Word has length 80 [2021-05-21 15:46:34,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:34,194 INFO L482 AbstractCegarLoop]: Abstraction has 2568 states and 7207 transitions. [2021-05-21 15:46:34,194 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.333333333333333) internal successors, (80), 15 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:34,194 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 7207 transitions. [2021-05-21 15:46:34,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-21 15:46:34,196 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:34,196 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:34,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-05-21 15:46:34,397 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:34,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:34,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1993419014, now seen corresponding path program 50 times [2021-05-21 15:46:34,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:34,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180646113] [2021-05-21 15:46:34,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:34,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:34,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180646113] [2021-05-21 15:46:34,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180646113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:34,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417415246] [2021-05-21 15:46:34,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:34,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:46:34,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:34,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:46:34,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:34,633 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:34,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417415246] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:34,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:34,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-05-21 15:46:34,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524053818] [2021-05-21 15:46:34,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:46:34,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:34,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:46:34,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:46:34,634 INFO L87 Difference]: Start difference. First operand 2568 states and 7207 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:35,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:35,075 INFO L93 Difference]: Finished difference Result 3851 states and 10341 transitions. [2021-05-21 15:46:35,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:46:35,075 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-05-21 15:46:35,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:35,079 INFO L225 Difference]: With dead ends: 3851 [2021-05-21 15:46:35,079 INFO L226 Difference]: Without dead ends: 3276 [2021-05-21 15:46:35,079 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 385.4ms TimeCoverageRelationStatistics Valid=405, Invalid=1317, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 15:46:35,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-05-21 15:46:35,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-05-21 15:46:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:35,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-05-21 15:46:35,107 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 80 [2021-05-21 15:46:35,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:35,107 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-05-21 15:46:35,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:35,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-05-21 15:46:35,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:46:35,109 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:35,109 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:35,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:35,310 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:35,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:35,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1150498713, now seen corresponding path program 51 times [2021-05-21 15:46:35,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:35,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635799938] [2021-05-21 15:46:35,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:35,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:35,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:35,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635799938] [2021-05-21 15:46:35,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635799938] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:35,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567133104] [2021-05-21 15:46:35,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:35,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 15:46:35,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:35,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:46:35,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:35,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567133104] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:35,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:35,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-05-21 15:46:35,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610634588] [2021-05-21 15:46:35,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:46:35,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:35,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:46:35,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:46:35,621 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:35,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:35,858 INFO L93 Difference]: Finished difference Result 3446 states and 9097 transitions. [2021-05-21 15:46:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:46:35,859 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:46:35,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:35,862 INFO L225 Difference]: With dead ends: 3446 [2021-05-21 15:46:35,862 INFO L226 Difference]: Without dead ends: 3176 [2021-05-21 15:46:35,862 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=262, Invalid=794, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:46:35,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-05-21 15:46:35,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-05-21 15:46:35,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:35,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-05-21 15:46:35,888 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-05-21 15:46:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:35,888 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-05-21 15:46:35,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-05-21 15:46:35,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:46:35,890 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:35,890 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:36,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:36,091 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:36,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:36,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1817713047, now seen corresponding path program 52 times [2021-05-21 15:46:36,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:36,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261733457] [2021-05-21 15:46:36,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:36,211 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:36,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:36,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261733457] [2021-05-21 15:46:36,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261733457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:36,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997411813] [2021-05-21 15:46:36,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:36,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:46:36,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:36,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:46:36,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:36,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997411813] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:36,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:36,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-05-21 15:46:36,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496103408] [2021-05-21 15:46:36,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:36,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:36,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:36,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:36,379 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:36,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:36,663 INFO L93 Difference]: Finished difference Result 3641 states and 9487 transitions. [2021-05-21 15:46:36,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:46:36,663 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:46:36,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:36,667 INFO L225 Difference]: With dead ends: 3641 [2021-05-21 15:46:36,667 INFO L226 Difference]: Without dead ends: 3371 [2021-05-21 15:46:36,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 298.1ms TimeCoverageRelationStatistics Valid=305, Invalid=955, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:46:36,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3371 states. [2021-05-21 15:46:36,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3371 to 2603. [2021-05-21 15:46:36,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-05-21 15:46:36,694 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-05-21 15:46:36,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:36,696 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-05-21 15:46:36,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:36,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-05-21 15:46:36,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:46:36,698 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:36,698 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:36,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:36,899 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:36,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1363496873, now seen corresponding path program 53 times [2021-05-21 15:46:36,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:36,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252054573] [2021-05-21 15:46:36,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:36,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:36,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:36,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252054573] [2021-05-21 15:46:36,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252054573] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:36,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026858271] [2021-05-21 15:46:36,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:37,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 15:46:37,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:37,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:46:37,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:37,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026858271] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:37,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:37,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-05-21 15:46:37,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767732222] [2021-05-21 15:46:37,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:46:37,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:37,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:46:37,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:46:37,157 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:37,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:37,410 INFO L93 Difference]: Finished difference Result 3596 states and 9397 transitions. [2021-05-21 15:46:37,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:46:37,410 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:46:37,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:37,413 INFO L225 Difference]: With dead ends: 3596 [2021-05-21 15:46:37,413 INFO L226 Difference]: Without dead ends: 3326 [2021-05-21 15:46:37,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 248.7ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:46:37,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-05-21 15:46:37,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2603. [2021-05-21 15:46:37,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:37,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-05-21 15:46:37,440 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-05-21 15:46:37,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:37,440 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-05-21 15:46:37,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:37,440 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-05-21 15:46:37,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:46:37,442 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:37,442 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:37,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:37,643 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:37,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:37,643 INFO L82 PathProgramCache]: Analyzing trace with hash -364600537, now seen corresponding path program 54 times [2021-05-21 15:46:37,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:37,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221195064] [2021-05-21 15:46:37,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:37,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:37,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:37,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221195064] [2021-05-21 15:46:37,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221195064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:37,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933304202] [2021-05-21 15:46:37,745 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:37,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 15:46:37,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:37,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:46:37,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:37,944 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:37,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933304202] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:37,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:37,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-05-21 15:46:37,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083220644] [2021-05-21 15:46:37,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:37,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:37,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:37,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:37,945 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:38,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:38,245 INFO L93 Difference]: Finished difference Result 3546 states and 9297 transitions. [2021-05-21 15:46:38,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:46:38,245 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:46:38,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:38,249 INFO L225 Difference]: With dead ends: 3546 [2021-05-21 15:46:38,249 INFO L226 Difference]: Without dead ends: 3276 [2021-05-21 15:46:38,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 297.6ms TimeCoverageRelationStatistics Valid=334, Invalid=1072, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:46:38,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3276 states. [2021-05-21 15:46:38,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3276 to 2603. [2021-05-21 15:46:38,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-05-21 15:46:38,277 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-05-21 15:46:38,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:38,277 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-05-21 15:46:38,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:38,277 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-05-21 15:46:38,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:46:38,279 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:38,279 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:38,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-21 15:46:38,479 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:38,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:38,480 INFO L82 PathProgramCache]: Analyzing trace with hash 2051038869, now seen corresponding path program 55 times [2021-05-21 15:46:38,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:38,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427316567] [2021-05-21 15:46:38,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:38,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:38,569 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:38,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427316567] [2021-05-21 15:46:38,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427316567] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:38,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659190761] [2021-05-21 15:46:38,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:38,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:38,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:46:38,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:38,718 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:38,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659190761] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:38,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:38,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-05-21 15:46:38,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001832745] [2021-05-21 15:46:38,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:46:38,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:38,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:46:38,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:46:38,719 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:39,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:39,020 INFO L93 Difference]: Finished difference Result 3496 states and 9197 transitions. [2021-05-21 15:46:39,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:46:39,021 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:46:39,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:39,024 INFO L225 Difference]: With dead ends: 3496 [2021-05-21 15:46:39,024 INFO L226 Difference]: Without dead ends: 3226 [2021-05-21 15:46:39,024 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 258.9ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:46:39,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-05-21 15:46:39,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-05-21 15:46:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-05-21 15:46:39,047 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-05-21 15:46:39,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:39,048 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-05-21 15:46:39,048 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:39,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-05-21 15:46:39,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:46:39,049 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:39,050 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:39,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:39,250 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:39,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:39,250 INFO L82 PathProgramCache]: Analyzing trace with hash -213609115, now seen corresponding path program 56 times [2021-05-21 15:46:39,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:39,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742714670] [2021-05-21 15:46:39,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:39,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:39,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:39,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742714670] [2021-05-21 15:46:39,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742714670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:39,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112058128] [2021-05-21 15:46:39,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:39,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:46:39,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:39,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:46:39,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:39,533 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:39,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112058128] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:39,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:39,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-05-21 15:46:39,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841622851] [2021-05-21 15:46:39,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:39,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:39,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:39,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:39,534 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:39,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:39,882 INFO L93 Difference]: Finished difference Result 3446 states and 9097 transitions. [2021-05-21 15:46:39,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:46:39,883 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:46:39,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:39,885 INFO L225 Difference]: With dead ends: 3446 [2021-05-21 15:46:39,886 INFO L226 Difference]: Without dead ends: 3176 [2021-05-21 15:46:39,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 332.7ms TimeCoverageRelationStatistics Valid=379, Invalid=1181, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 15:46:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-05-21 15:46:39,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2603. [2021-05-21 15:46:39,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:39,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-05-21 15:46:39,909 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-05-21 15:46:39,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:39,909 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-05-21 15:46:39,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:39,909 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-05-21 15:46:39,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:46:39,910 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:39,911 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:40,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-21 15:46:40,124 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:40,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:40,124 INFO L82 PathProgramCache]: Analyzing trace with hash 400630355, now seen corresponding path program 57 times [2021-05-21 15:46:40,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:40,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572202241] [2021-05-21 15:46:40,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:40,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:40,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572202241] [2021-05-21 15:46:40,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572202241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:40,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795107561] [2021-05-21 15:46:40,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:40,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-21 15:46:40,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:40,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:46:40,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:40,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795107561] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:40,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:40,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-05-21 15:46:40,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564112321] [2021-05-21 15:46:40,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:46:40,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:40,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:46:40,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:46:40,366 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:40,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:40,666 INFO L93 Difference]: Finished difference Result 3396 states and 8997 transitions. [2021-05-21 15:46:40,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:46:40,666 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:46:40,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:40,669 INFO L225 Difference]: With dead ends: 3396 [2021-05-21 15:46:40,669 INFO L226 Difference]: Without dead ends: 3126 [2021-05-21 15:46:40,669 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=413, Invalid=1147, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 15:46:40,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-05-21 15:46:40,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2603. [2021-05-21 15:46:40,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.799000768639508) internal successors, (7283), 2602 states have internal predecessors, (7283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7283 transitions. [2021-05-21 15:46:40,692 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7283 transitions. Word has length 85 [2021-05-21 15:46:40,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:40,692 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7283 transitions. [2021-05-21 15:46:40,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:40,692 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7283 transitions. [2021-05-21 15:46:40,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:46:40,694 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:40,694 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:40,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:40,895 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:40,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1314611933, now seen corresponding path program 58 times [2021-05-21 15:46:40,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:40,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194019078] [2021-05-21 15:46:40,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:40,982 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:40,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:40,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194019078] [2021-05-21 15:46:40,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194019078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:40,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240917291] [2021-05-21 15:46:40,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:41,032 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:46:41,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:41,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:46:41,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:41,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240917291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:41,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:41,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-05-21 15:46:41,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872809546] [2021-05-21 15:46:41,147 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:41,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:41,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:41,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:41,147 INFO L87 Difference]: Start difference. First operand 2603 states and 7283 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:41,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:41,569 INFO L93 Difference]: Finished difference Result 3406 states and 9047 transitions. [2021-05-21 15:46:41,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:46:41,570 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:46:41,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:41,572 INFO L225 Difference]: With dead ends: 3406 [2021-05-21 15:46:41,572 INFO L226 Difference]: Without dead ends: 3136 [2021-05-21 15:46:41,572 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 394.0ms TimeCoverageRelationStatistics Valid=440, Invalid=1282, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 15:46:41,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3136 states. [2021-05-21 15:46:41,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3136 to 2603. [2021-05-21 15:46:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.800922367409685) internal successors, (7288), 2602 states have internal predecessors, (7288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:41,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7288 transitions. [2021-05-21 15:46:41,595 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7288 transitions. Word has length 85 [2021-05-21 15:46:41,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:41,595 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7288 transitions. [2021-05-21 15:46:41,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 18 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:41,595 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7288 transitions. [2021-05-21 15:46:41,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:46:41,596 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:41,597 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:41,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:41,797 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:41,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:41,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1947707761, now seen corresponding path program 59 times [2021-05-21 15:46:41,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:41,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372872148] [2021-05-21 15:46:41,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:41,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:41,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372872148] [2021-05-21 15:46:41,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372872148] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:41,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836744717] [2021-05-21 15:46:41,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:41,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-21 15:46:41,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:41,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-21 15:46:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:42,042 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:42,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836744717] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:42,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:42,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-05-21 15:46:42,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074479052] [2021-05-21 15:46:42,043 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-21 15:46:42,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:42,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-21 15:46:42,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2021-05-21 15:46:42,043 INFO L87 Difference]: Start difference. First operand 2603 states and 7288 transitions. Second operand has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:42,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:42,375 INFO L93 Difference]: Finished difference Result 4148 states and 11171 transitions. [2021-05-21 15:46:42,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:46:42,375 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:46:42,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:42,379 INFO L225 Difference]: With dead ends: 4148 [2021-05-21 15:46:42,379 INFO L226 Difference]: Without dead ends: 3878 [2021-05-21 15:46:42,379 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 295.0ms TimeCoverageRelationStatistics Valid=489, Invalid=1233, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 15:46:42,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3878 states. [2021-05-21 15:46:42,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3878 to 2783. [2021-05-21 15:46:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2783 states, 2782 states have (on average 2.8206326383896476) internal successors, (7847), 2782 states have internal predecessors, (7847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:42,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2783 states to 2783 states and 7847 transitions. [2021-05-21 15:46:42,410 INFO L78 Accepts]: Start accepts. Automaton has 2783 states and 7847 transitions. Word has length 85 [2021-05-21 15:46:42,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:42,410 INFO L482 AbstractCegarLoop]: Abstraction has 2783 states and 7847 transitions. [2021-05-21 15:46:42,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 5.117647058823529) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:42,410 INFO L276 IsEmpty]: Start isEmpty. Operand 2783 states and 7847 transitions. [2021-05-21 15:46:42,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-05-21 15:46:42,412 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:42,412 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:42,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:42,612 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:42,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:42,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1970051011, now seen corresponding path program 60 times [2021-05-21 15:46:42,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:42,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413003652] [2021-05-21 15:46:42,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:42,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:42,699 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:42,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:42,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413003652] [2021-05-21 15:46:42,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413003652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:42,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665433235] [2021-05-21 15:46:42,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:42,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-21 15:46:42,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:42,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:46:42,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:42,859 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:42,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665433235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:42,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:42,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-05-21 15:46:42,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286123196] [2021-05-21 15:46:42,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:42,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:42,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:42,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:42,860 INFO L87 Difference]: Start difference. First operand 2783 states and 7847 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:43,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:43,321 INFO L93 Difference]: Finished difference Result 4016 states and 10836 transitions. [2021-05-21 15:46:43,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:46:43,322 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-05-21 15:46:43,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:43,325 INFO L225 Difference]: With dead ends: 4016 [2021-05-21 15:46:43,326 INFO L226 Difference]: Without dead ends: 3441 [2021-05-21 15:46:43,326 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 416.2ms TimeCoverageRelationStatistics Valid=521, Invalid=1641, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:46:43,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3441 states. [2021-05-21 15:46:43,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3441 to 1924. [2021-05-21 15:46:43,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1924 states, 1923 states have (on average 2.733229329173167) internal successors, (5256), 1923 states have internal predecessors, (5256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:43,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1924 states to 1924 states and 5256 transitions. [2021-05-21 15:46:43,349 INFO L78 Accepts]: Start accepts. Automaton has 1924 states and 5256 transitions. Word has length 85 [2021-05-21 15:46:43,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:43,350 INFO L482 AbstractCegarLoop]: Abstraction has 1924 states and 5256 transitions. [2021-05-21 15:46:43,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 18 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:43,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1924 states and 5256 transitions. [2021-05-21 15:46:43,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:46:43,351 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:43,352 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:43,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:43,566 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:43,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:43,566 INFO L82 PathProgramCache]: Analyzing trace with hash 834350121, now seen corresponding path program 61 times [2021-05-21 15:46:43,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:43,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244476090] [2021-05-21 15:46:43,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:43,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:43,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:43,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244476090] [2021-05-21 15:46:43,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244476090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:43,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988063685] [2021-05-21 15:46:43,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:43,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:43,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:46:43,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:43,974 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:43,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988063685] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:43,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:43,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 21 [2021-05-21 15:46:43,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150550034] [2021-05-21 15:46:43,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:46:43,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:43,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:46:43,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:46:43,976 INFO L87 Difference]: Start difference. First operand 1924 states and 5256 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:44,254 INFO L93 Difference]: Finished difference Result 2864 states and 7456 transitions. [2021-05-21 15:46:44,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:46:44,255 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:46:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:44,257 INFO L225 Difference]: With dead ends: 2864 [2021-05-21 15:46:44,257 INFO L226 Difference]: Without dead ends: 2530 [2021-05-21 15:46:44,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 320.7ms TimeCoverageRelationStatistics Valid=386, Invalid=1096, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:46:44,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2530 states. [2021-05-21 15:46:44,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2530 to 2009. [2021-05-21 15:46:44,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2009 states, 2008 states have (on average 2.702191235059761) internal successors, (5426), 2008 states have internal predecessors, (5426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:44,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2009 states to 2009 states and 5426 transitions. [2021-05-21 15:46:44,278 INFO L78 Accepts]: Start accepts. Automaton has 2009 states and 5426 transitions. Word has length 90 [2021-05-21 15:46:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:44,278 INFO L482 AbstractCegarLoop]: Abstraction has 2009 states and 5426 transitions. [2021-05-21 15:46:44,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 21 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand 2009 states and 5426 transitions. [2021-05-21 15:46:44,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:46:44,279 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:44,279 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:44,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-05-21 15:46:44,480 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:44,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:44,480 INFO L82 PathProgramCache]: Analyzing trace with hash -207325971, now seen corresponding path program 62 times [2021-05-21 15:46:44,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:44,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651141838] [2021-05-21 15:46:44,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:44,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:44,595 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:44,596 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:44,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651141838] [2021-05-21 15:46:44,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651141838] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:44,596 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474890835] [2021-05-21 15:46:44,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:44,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:46:44,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:44,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:46:44,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:44,763 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:44,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474890835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:44,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:44,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-21 15:46:44,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747356715] [2021-05-21 15:46:44,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:44,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:44,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:44,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:44,764 INFO L87 Difference]: Start difference. First operand 2009 states and 5426 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:44,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:44,971 INFO L93 Difference]: Finished difference Result 3386 states and 8437 transitions. [2021-05-21 15:46:44,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-21 15:46:44,972 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:46:44,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:44,975 INFO L225 Difference]: With dead ends: 3386 [2021-05-21 15:46:44,975 INFO L226 Difference]: Without dead ends: 3116 [2021-05-21 15:46:44,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 229.8ms TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2021-05-21 15:46:44,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3116 states. [2021-05-21 15:46:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3116 to 2153. [2021-05-21 15:46:44,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2153 states, 2152 states have (on average 2.715148698884758) internal successors, (5843), 2152 states have internal predecessors, (5843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:44,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2153 states to 2153 states and 5843 transitions. [2021-05-21 15:46:44,999 INFO L78 Accepts]: Start accepts. Automaton has 2153 states and 5843 transitions. Word has length 90 [2021-05-21 15:46:44,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:44,999 INFO L482 AbstractCegarLoop]: Abstraction has 2153 states and 5843 transitions. [2021-05-21 15:46:44,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:44,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2153 states and 5843 transitions. [2021-05-21 15:46:45,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:46:45,000 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:45,000 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:45,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:45,202 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:45,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:45,202 INFO L82 PathProgramCache]: Analyzing trace with hash -452403267, now seen corresponding path program 63 times [2021-05-21 15:46:45,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:45,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356875219] [2021-05-21 15:46:45,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:45,316 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:45,316 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:45,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356875219] [2021-05-21 15:46:45,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356875219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:45,316 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381488658] [2021-05-21 15:46:45,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:45,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 15:46:45,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:45,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:46:45,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:45,510 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:45,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381488658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:45,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:45,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-05-21 15:46:45,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781247362] [2021-05-21 15:46:45,510 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:46:45,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:45,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:46:45,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:46:45,511 INFO L87 Difference]: Start difference. First operand 2153 states and 5843 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:45,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:45,793 INFO L93 Difference]: Finished difference Result 3346 states and 8432 transitions. [2021-05-21 15:46:45,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:46:45,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:46:45,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:45,796 INFO L225 Difference]: With dead ends: 3346 [2021-05-21 15:46:45,797 INFO L226 Difference]: Without dead ends: 3076 [2021-05-21 15:46:45,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 291.7ms TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:46:45,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3076 states. [2021-05-21 15:46:45,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3076 to 2228. [2021-05-21 15:46:45,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2227 states have (on average 2.724741805118994) internal successors, (6068), 2227 states have internal predecessors, (6068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:45,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 6068 transitions. [2021-05-21 15:46:45,821 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 6068 transitions. Word has length 90 [2021-05-21 15:46:45,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:45,821 INFO L482 AbstractCegarLoop]: Abstraction has 2228 states and 6068 transitions. [2021-05-21 15:46:45,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:45,821 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 6068 transitions. [2021-05-21 15:46:45,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:46:45,823 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:45,823 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:46,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:46,023 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:46,024 INFO L82 PathProgramCache]: Analyzing trace with hash -829253589, now seen corresponding path program 64 times [2021-05-21 15:46:46,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:46,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668795925] [2021-05-21 15:46:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:46,134 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:46,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:46,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668795925] [2021-05-21 15:46:46,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668795925] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:46,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530304432] [2021-05-21 15:46:46,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:46,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:46:46,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:46,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:46:46,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:46,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530304432] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:46,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:46,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-21 15:46:46,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913597778] [2021-05-21 15:46:46,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:46,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:46,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:46,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:46,293 INFO L87 Difference]: Start difference. First operand 2228 states and 6068 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:46,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:46,528 INFO L93 Difference]: Finished difference Result 3396 states and 8607 transitions. [2021-05-21 15:46:46,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-21 15:46:46,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:46:46,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:46,531 INFO L225 Difference]: With dead ends: 3396 [2021-05-21 15:46:46,531 INFO L226 Difference]: Without dead ends: 3126 [2021-05-21 15:46:46,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 244.1ms TimeCoverageRelationStatistics Valid=294, Invalid=896, Unknown=0, NotChecked=0, Total=1190 [2021-05-21 15:46:46,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3126 states. [2021-05-21 15:46:46,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3126 to 2303. [2021-05-21 15:46:46,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2303 states, 2302 states have (on average 2.7337098175499563) internal successors, (6293), 2302 states have internal predecessors, (6293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:46,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2303 states to 2303 states and 6293 transitions. [2021-05-21 15:46:46,554 INFO L78 Accepts]: Start accepts. Automaton has 2303 states and 6293 transitions. Word has length 90 [2021-05-21 15:46:46,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:46,554 INFO L482 AbstractCegarLoop]: Abstraction has 2303 states and 6293 transitions. [2021-05-21 15:46:46,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:46,554 INFO L276 IsEmpty]: Start isEmpty. Operand 2303 states and 6293 transitions. [2021-05-21 15:46:46,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:46:46,555 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:46,555 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:46,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-21 15:46:46,756 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:46,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:46,756 INFO L82 PathProgramCache]: Analyzing trace with hash 497501947, now seen corresponding path program 65 times [2021-05-21 15:46:46,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:46,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233271294] [2021-05-21 15:46:46,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:46,864 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:46,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:46,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233271294] [2021-05-21 15:46:46,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233271294] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:46,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116306241] [2021-05-21 15:46:46,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:46,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 15:46:46,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:46,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:46:46,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:47,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116306241] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:47,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:47,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-05-21 15:46:47,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692769583] [2021-05-21 15:46:47,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:46:47,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:47,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:46:47,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:46:47,052 INFO L87 Difference]: Start difference. First operand 2303 states and 6293 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:47,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:47,363 INFO L93 Difference]: Finished difference Result 3421 states and 8732 transitions. [2021-05-21 15:46:47,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:46:47,364 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:46:47,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:47,367 INFO L225 Difference]: With dead ends: 3421 [2021-05-21 15:46:47,367 INFO L226 Difference]: Without dead ends: 3151 [2021-05-21 15:46:47,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 313.2ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:46:47,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3151 states. [2021-05-21 15:46:47,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3151 to 2378. [2021-05-21 15:46:47,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2378 states, 2377 states have (on average 2.7421119057635677) internal successors, (6518), 2377 states have internal predecessors, (6518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:47,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2378 states to 2378 states and 6518 transitions. [2021-05-21 15:46:47,391 INFO L78 Accepts]: Start accepts. Automaton has 2378 states and 6518 transitions. Word has length 90 [2021-05-21 15:46:47,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:47,391 INFO L482 AbstractCegarLoop]: Abstraction has 2378 states and 6518 transitions. [2021-05-21 15:46:47,391 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:47,391 INFO L276 IsEmpty]: Start isEmpty. Operand 2378 states and 6518 transitions. [2021-05-21 15:46:47,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:46:47,393 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:47,393 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:47,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:47,593 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:47,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:47,594 INFO L82 PathProgramCache]: Analyzing trace with hash 951718121, now seen corresponding path program 66 times [2021-05-21 15:46:47,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:47,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336355351] [2021-05-21 15:46:47,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:47,699 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:47,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:47,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336355351] [2021-05-21 15:46:47,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336355351] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:47,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046167870] [2021-05-21 15:46:47,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:47,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 15:46:47,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:47,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:46:47,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:47,883 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:47,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046167870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:47,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:47,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-21 15:46:47,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905076144] [2021-05-21 15:46:47,892 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:47,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:47,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:47,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:47,893 INFO L87 Difference]: Start difference. First operand 2378 states and 6518 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:48,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:48,160 INFO L93 Difference]: Finished difference Result 3446 states and 8857 transitions. [2021-05-21 15:46:48,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:46:48,161 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:46:48,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:48,164 INFO L225 Difference]: With dead ends: 3446 [2021-05-21 15:46:48,164 INFO L226 Difference]: Without dead ends: 3176 [2021-05-21 15:46:48,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 259.4ms TimeCoverageRelationStatistics Valid=322, Invalid=1010, Unknown=0, NotChecked=0, Total=1332 [2021-05-21 15:46:48,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3176 states. [2021-05-21 15:46:48,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3176 to 2453. [2021-05-21 15:46:48,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2452 states have (on average 2.75) internal successors, (6743), 2452 states have internal predecessors, (6743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:48,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 6743 transitions. [2021-05-21 15:46:48,189 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 6743 transitions. Word has length 90 [2021-05-21 15:46:48,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:48,189 INFO L482 AbstractCegarLoop]: Abstraction has 2453 states and 6743 transitions. [2021-05-21 15:46:48,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:48,189 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 6743 transitions. [2021-05-21 15:46:48,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:46:48,191 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:48,191 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:48,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-21 15:46:48,391 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:48,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:48,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1950614457, now seen corresponding path program 67 times [2021-05-21 15:46:48,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:48,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791065223] [2021-05-21 15:46:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:48,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:48,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:48,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791065223] [2021-05-21 15:46:48,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791065223] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:48,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048976306] [2021-05-21 15:46:48,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:48,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:48,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:46:48,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:48,688 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:48,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048976306] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:48,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:48,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-05-21 15:46:48,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228895051] [2021-05-21 15:46:48,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:46:48,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:48,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:46:48,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:46:48,689 INFO L87 Difference]: Start difference. First operand 2453 states and 6743 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:49,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:49,041 INFO L93 Difference]: Finished difference Result 3471 states and 8982 transitions. [2021-05-21 15:46:49,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:46:49,041 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:46:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:49,044 INFO L225 Difference]: With dead ends: 3471 [2021-05-21 15:46:49,044 INFO L226 Difference]: Without dead ends: 3201 [2021-05-21 15:46:49,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 15:46:49,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3201 states. [2021-05-21 15:46:49,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3201 to 2528. [2021-05-21 15:46:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2528 states, 2527 states have (on average 2.7574198654531066) internal successors, (6968), 2527 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2528 states to 2528 states and 6968 transitions. [2021-05-21 15:46:49,070 INFO L78 Accepts]: Start accepts. Automaton has 2528 states and 6968 transitions. Word has length 90 [2021-05-21 15:46:49,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:49,070 INFO L482 AbstractCegarLoop]: Abstraction has 2528 states and 6968 transitions. [2021-05-21 15:46:49,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:49,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2528 states and 6968 transitions. [2021-05-21 15:46:49,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:46:49,072 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:49,072 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:49,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-21 15:46:49,277 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:49,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:49,277 INFO L82 PathProgramCache]: Analyzing trace with hash 71286567, now seen corresponding path program 68 times [2021-05-21 15:46:49,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:49,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567844342] [2021-05-21 15:46:49,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:49,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:49,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:49,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567844342] [2021-05-21 15:46:49,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567844342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:49,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473189221] [2021-05-21 15:46:49,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:49,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:46:49,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:49,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:46:49,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:49,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473189221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:49,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:49,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-21 15:46:49,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894423967] [2021-05-21 15:46:49,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:49,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:49,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:49,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:49,546 INFO L87 Difference]: Start difference. First operand 2528 states and 6968 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:49,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:49,844 INFO L93 Difference]: Finished difference Result 3496 states and 9107 transitions. [2021-05-21 15:46:49,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:46:49,844 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:46:49,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:49,847 INFO L225 Difference]: With dead ends: 3496 [2021-05-21 15:46:49,848 INFO L226 Difference]: Without dead ends: 3226 [2021-05-21 15:46:49,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 288.8ms TimeCoverageRelationStatistics Valid=366, Invalid=1116, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:46:49,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3226 states. [2021-05-21 15:46:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3226 to 2603. [2021-05-21 15:46:49,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.764411990776326) internal successors, (7193), 2602 states have internal predecessors, (7193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7193 transitions. [2021-05-21 15:46:49,874 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7193 transitions. Word has length 90 [2021-05-21 15:46:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:49,874 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7193 transitions. [2021-05-21 15:46:49,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:49,875 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7193 transitions. [2021-05-21 15:46:49,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:46:49,876 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:49,876 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:50,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:50,077 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:50,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:50,077 INFO L82 PathProgramCache]: Analyzing trace with hash 2101605879, now seen corresponding path program 69 times [2021-05-21 15:46:50,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:50,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237055208] [2021-05-21 15:46:50,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:50,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:50,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:50,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237055208] [2021-05-21 15:46:50,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237055208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:50,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703229014] [2021-05-21 15:46:50,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:50,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 15:46:50,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:50,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:46:50,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:50,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703229014] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:50,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:50,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-05-21 15:46:50,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580001215] [2021-05-21 15:46:50,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:46:50,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:50,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:46:50,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:46:50,344 INFO L87 Difference]: Start difference. First operand 2603 states and 7193 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:50,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:50,723 INFO L93 Difference]: Finished difference Result 3521 states and 9232 transitions. [2021-05-21 15:46:50,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:46:50,724 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:46:50,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:50,727 INFO L225 Difference]: With dead ends: 3521 [2021-05-21 15:46:50,727 INFO L226 Difference]: Without dead ends: 3251 [2021-05-21 15:46:50,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=376, Invalid=1264, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 15:46:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3251 states. [2021-05-21 15:46:50,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3251 to 2678. [2021-05-21 15:46:50,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.771012327231976) internal successors, (7418), 2677 states have internal predecessors, (7418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:50,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7418 transitions. [2021-05-21 15:46:50,755 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7418 transitions. Word has length 90 [2021-05-21 15:46:50,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:50,755 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7418 transitions. [2021-05-21 15:46:50,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:50,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7418 transitions. [2021-05-21 15:46:50,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:46:50,757 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:50,757 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:50,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:50,957 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:50,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:50,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1579121947, now seen corresponding path program 70 times [2021-05-21 15:46:50,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:50,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328485968] [2021-05-21 15:46:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:51,062 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:51,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:51,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328485968] [2021-05-21 15:46:51,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328485968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:51,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465206821] [2021-05-21 15:46:51,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:51,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:46:51,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:51,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:46:51,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:51,220 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:51,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465206821] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:51,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:51,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-21 15:46:51,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160624532] [2021-05-21 15:46:51,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:51,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:51,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:51,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:51,221 INFO L87 Difference]: Start difference. First operand 2678 states and 7418 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:51,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:51,543 INFO L93 Difference]: Finished difference Result 3591 states and 9477 transitions. [2021-05-21 15:46:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:46:51,544 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:46:51,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:51,547 INFO L225 Difference]: With dead ends: 3591 [2021-05-21 15:46:51,547 INFO L226 Difference]: Without dead ends: 3321 [2021-05-21 15:46:51,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 316.3ms TimeCoverageRelationStatistics Valid=426, Invalid=1214, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 15:46:51,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-05-21 15:46:51,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2753. [2021-05-21 15:46:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.782703488372093) internal successors, (7658), 2752 states have internal predecessors, (7658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:51,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7658 transitions. [2021-05-21 15:46:51,593 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7658 transitions. Word has length 90 [2021-05-21 15:46:51,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:51,593 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7658 transitions. [2021-05-21 15:46:51,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:51,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7658 transitions. [2021-05-21 15:46:51,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:46:51,595 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:51,595 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:51,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:51,795 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:51,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:51,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1000603061, now seen corresponding path program 71 times [2021-05-21 15:46:51,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:51,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301749266] [2021-05-21 15:46:51,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:51,920 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:51,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:51,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301749266] [2021-05-21 15:46:51,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301749266] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:51,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006456871] [2021-05-21 15:46:51,921 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:51,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 15:46:51,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:51,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:46:51,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:52,110 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:52,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006456871] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:52,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:52,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-05-21 15:46:52,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136864938] [2021-05-21 15:46:52,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:46:52,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:52,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:46:52,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:46:52,111 INFO L87 Difference]: Start difference. First operand 2753 states and 7658 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:52,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:52,607 INFO L93 Difference]: Finished difference Result 4169 states and 11103 transitions. [2021-05-21 15:46:52,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:46:52,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:46:52,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:52,611 INFO L225 Difference]: With dead ends: 4169 [2021-05-21 15:46:52,611 INFO L226 Difference]: Without dead ends: 3546 [2021-05-21 15:46:52,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 453.6ms TimeCoverageRelationStatistics Valid=534, Invalid=1628, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:46:52,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3546 states. [2021-05-21 15:46:52,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3546 to 2828. [2021-05-21 15:46:52,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.790237000353732) internal successors, (7888), 2827 states have internal predecessors, (7888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:52,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7888 transitions. [2021-05-21 15:46:52,645 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7888 transitions. Word has length 90 [2021-05-21 15:46:52,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:52,645 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7888 transitions. [2021-05-21 15:46:52,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 19 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:52,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7888 transitions. [2021-05-21 15:46:52,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:46:52,647 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:52,647 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:52,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:52,848 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:52,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:52,848 INFO L82 PathProgramCache]: Analyzing trace with hash -32044541, now seen corresponding path program 72 times [2021-05-21 15:46:52,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:52,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075045054] [2021-05-21 15:46:52,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:52,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:52,933 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:52,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:52,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075045054] [2021-05-21 15:46:52,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075045054] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:52,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69044674] [2021-05-21 15:46:52,933 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:52,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 15:46:52,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:52,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:46:52,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:53,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69044674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:53,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:53,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-21 15:46:53,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078066810] [2021-05-21 15:46:53,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:53,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:53,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:53,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:53,087 INFO L87 Difference]: Start difference. First operand 2828 states and 7888 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:53,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:53,460 INFO L93 Difference]: Finished difference Result 4398 states and 11821 transitions. [2021-05-21 15:46:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:46:53,460 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:46:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:53,464 INFO L225 Difference]: With dead ends: 4398 [2021-05-21 15:46:53,465 INFO L226 Difference]: Without dead ends: 4128 [2021-05-21 15:46:53,465 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 319.1ms TimeCoverageRelationStatistics Valid=503, Invalid=1303, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 15:46:53,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-05-21 15:46:53,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3008. [2021-05-21 15:46:53,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 2.809112071832391) internal successors, (8447), 3007 states have internal predecessors, (8447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:53,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 8447 transitions. [2021-05-21 15:46:53,495 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 8447 transitions. Word has length 90 [2021-05-21 15:46:53,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:53,495 INFO L482 AbstractCegarLoop]: Abstraction has 3008 states and 8447 transitions. [2021-05-21 15:46:53,495 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:53,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 8447 transitions. [2021-05-21 15:46:53,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-21 15:46:53,497 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:53,497 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:53,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:53,698 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:53,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:53,702 INFO L82 PathProgramCache]: Analyzing trace with hash -9701291, now seen corresponding path program 73 times [2021-05-21 15:46:53,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:53,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390876688] [2021-05-21 15:46:53,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:53,813 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:53,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:53,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390876688] [2021-05-21 15:46:53,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390876688] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:53,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988019050] [2021-05-21 15:46:53,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:53,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:53,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 15:46:53,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:53,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988019050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:53,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:53,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-05-21 15:46:53,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157075300] [2021-05-21 15:46:53,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:53,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:53,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:53,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:53,969 INFO L87 Difference]: Start difference. First operand 3008 states and 8447 transitions. Second operand has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:54,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:54,455 INFO L93 Difference]: Finished difference Result 3885 states and 10521 transitions. [2021-05-21 15:46:54,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:46:54,455 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-05-21 15:46:54,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:54,458 INFO L225 Difference]: With dead ends: 3885 [2021-05-21 15:46:54,458 INFO L226 Difference]: Without dead ends: 3306 [2021-05-21 15:46:54,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 462.8ms TimeCoverageRelationStatistics Valid=579, Invalid=1491, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 15:46:54,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-05-21 15:46:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 2113. [2021-05-21 15:46:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2113 states, 2112 states have (on average 2.7357954545454546) internal successors, (5778), 2112 states have internal predecessors, (5778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:54,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2113 states to 2113 states and 5778 transitions. [2021-05-21 15:46:54,481 INFO L78 Accepts]: Start accepts. Automaton has 2113 states and 5778 transitions. Word has length 90 [2021-05-21 15:46:54,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:54,481 INFO L482 AbstractCegarLoop]: Abstraction has 2113 states and 5778 transitions. [2021-05-21 15:46:54,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.111111111111111) internal successors, (92), 18 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:54,481 INFO L276 IsEmpty]: Start isEmpty. Operand 2113 states and 5778 transitions. [2021-05-21 15:46:54,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:46:54,483 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:54,483 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:54,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-05-21 15:46:54,684 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:54,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:54,684 INFO L82 PathProgramCache]: Analyzing trace with hash -567911574, now seen corresponding path program 74 times [2021-05-21 15:46:54,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:54,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966440842] [2021-05-21 15:46:54,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:54,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:54,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:54,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966440842] [2021-05-21 15:46:54,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966440842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:54,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538921269] [2021-05-21 15:46:54,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:54,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:46:54,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:54,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:46:54,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:54,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538921269] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:54,983 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:54,983 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-05-21 15:46:54,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012848151] [2021-05-21 15:46:54,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:54,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:54,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:54,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:54,984 INFO L87 Difference]: Start difference. First operand 2113 states and 5778 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:55,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:55,230 INFO L93 Difference]: Finished difference Result 3131 states and 8017 transitions. [2021-05-21 15:46:55,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:46:55,230 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:46:55,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:55,233 INFO L225 Difference]: With dead ends: 3131 [2021-05-21 15:46:55,233 INFO L226 Difference]: Without dead ends: 2861 [2021-05-21 15:46:55,233 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 258.8ms TimeCoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:46:55,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2861 states. [2021-05-21 15:46:55,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2861 to 2188. [2021-05-21 15:46:55,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.7448559670781894) internal successors, (6003), 2187 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:55,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 6003 transitions. [2021-05-21 15:46:55,256 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 6003 transitions. Word has length 95 [2021-05-21 15:46:55,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:55,256 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 6003 transitions. [2021-05-21 15:46:55,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 6003 transitions. [2021-05-21 15:46:55,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:46:55,258 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:55,258 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:55,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:55,461 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:55,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:55,461 INFO L82 PathProgramCache]: Analyzing trace with hash -812988870, now seen corresponding path program 75 times [2021-05-21 15:46:55,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:55,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556046114] [2021-05-21 15:46:55,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:55,590 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:55,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:55,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556046114] [2021-05-21 15:46:55,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556046114] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:55,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620519009] [2021-05-21 15:46:55,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:55,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 15:46:55,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:55,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:46:55,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:55,782 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:55,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620519009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:55,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:55,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-05-21 15:46:55,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150087038] [2021-05-21 15:46:55,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:46:55,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:55,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:46:55,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:46:55,783 INFO L87 Difference]: Start difference. First operand 2188 states and 6003 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:56,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:56,087 INFO L93 Difference]: Finished difference Result 3451 states and 8732 transitions. [2021-05-21 15:46:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:46:56,088 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:46:56,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:56,091 INFO L225 Difference]: With dead ends: 3451 [2021-05-21 15:46:56,091 INFO L226 Difference]: Without dead ends: 3181 [2021-05-21 15:46:56,091 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 312.1ms TimeCoverageRelationStatistics Valid=355, Invalid=1127, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:46:56,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-05-21 15:46:56,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2263. [2021-05-21 15:46:56,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.753315649867374) internal successors, (6228), 2262 states have internal predecessors, (6228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:56,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6228 transitions. [2021-05-21 15:46:56,117 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6228 transitions. Word has length 95 [2021-05-21 15:46:56,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:56,117 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6228 transitions. [2021-05-21 15:46:56,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:56,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6228 transitions. [2021-05-21 15:46:56,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:46:56,118 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:56,119 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:56,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:56,319 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:56,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:56,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1189839192, now seen corresponding path program 76 times [2021-05-21 15:46:56,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:56,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920739074] [2021-05-21 15:46:56,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:56,437 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:56,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:56,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920739074] [2021-05-21 15:46:56,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920739074] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:56,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262827345] [2021-05-21 15:46:56,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:56,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:46:56,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:56,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:46:56,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:56,593 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262827345] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:56,593 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:56,593 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-05-21 15:46:56,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156308144] [2021-05-21 15:46:56,593 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:56,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:56,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:56,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:56,594 INFO L87 Difference]: Start difference. First operand 2263 states and 6228 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:56,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:56,872 INFO L93 Difference]: Finished difference Result 3481 states and 8867 transitions. [2021-05-21 15:46:56,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:46:56,872 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:46:56,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:56,875 INFO L225 Difference]: With dead ends: 3481 [2021-05-21 15:46:56,875 INFO L226 Difference]: Without dead ends: 3211 [2021-05-21 15:46:56,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 281.5ms TimeCoverageRelationStatistics Valid=361, Invalid=1121, Unknown=0, NotChecked=0, Total=1482 [2021-05-21 15:46:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3211 states. [2021-05-21 15:46:56,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3211 to 2338. [2021-05-21 15:46:56,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.761232349165597) internal successors, (6453), 2337 states have internal predecessors, (6453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:56,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6453 transitions. [2021-05-21 15:46:56,900 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6453 transitions. Word has length 95 [2021-05-21 15:46:56,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:56,900 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6453 transitions. [2021-05-21 15:46:56,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:56,900 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6453 transitions. [2021-05-21 15:46:56,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:46:56,901 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:56,902 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:57,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-21 15:46:57,102 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:57,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:57,102 INFO L82 PathProgramCache]: Analyzing trace with hash 136916344, now seen corresponding path program 77 times [2021-05-21 15:46:57,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:57,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903329361] [2021-05-21 15:46:57,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:57,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:57,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903329361] [2021-05-21 15:46:57,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903329361] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:57,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947656146] [2021-05-21 15:46:57,223 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:57,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 15:46:57,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:57,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:46:57,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:57,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947656146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:57,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:57,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-05-21 15:46:57,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029574194] [2021-05-21 15:46:57,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:46:57,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:57,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:46:57,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:46:57,397 INFO L87 Difference]: Start difference. First operand 2338 states and 6453 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:57,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:57,761 INFO L93 Difference]: Finished difference Result 3506 states and 8992 transitions. [2021-05-21 15:46:57,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:46:57,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:46:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:57,764 INFO L225 Difference]: With dead ends: 3506 [2021-05-21 15:46:57,764 INFO L226 Difference]: Without dead ends: 3236 [2021-05-21 15:46:57,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 352.4ms TimeCoverageRelationStatistics Valid=383, Invalid=1257, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 15:46:57,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-05-21 15:46:57,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2413. [2021-05-21 15:46:57,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.7686567164179103) internal successors, (6678), 2412 states have internal predecessors, (6678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6678 transitions. [2021-05-21 15:46:57,790 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6678 transitions. Word has length 95 [2021-05-21 15:46:57,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:57,790 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6678 transitions. [2021-05-21 15:46:57,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:57,790 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6678 transitions. [2021-05-21 15:46:57,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:46:57,792 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:57,792 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:57,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:57,992 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:57,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:57,992 INFO L82 PathProgramCache]: Analyzing trace with hash 591132518, now seen corresponding path program 78 times [2021-05-21 15:46:57,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:57,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047946037] [2021-05-21 15:46:57,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:58,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:58,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047946037] [2021-05-21 15:46:58,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047946037] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:58,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246795109] [2021-05-21 15:46:58,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:58,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 15:46:58,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:58,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:46:58,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:58,266 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:58,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246795109] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:58,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:58,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-05-21 15:46:58,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92556466] [2021-05-21 15:46:58,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:58,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:58,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:58,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:58,267 INFO L87 Difference]: Start difference. First operand 2413 states and 6678 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:58,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:58,578 INFO L93 Difference]: Finished difference Result 3531 states and 9117 transitions. [2021-05-21 15:46:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:46:58,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:46:58,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:58,581 INFO L225 Difference]: With dead ends: 3531 [2021-05-21 15:46:58,581 INFO L226 Difference]: Without dead ends: 3261 [2021-05-21 15:46:58,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 15:46:58,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3261 states. [2021-05-21 15:46:58,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3261 to 2488. [2021-05-21 15:46:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7756332931242462) internal successors, (6903), 2487 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:58,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6903 transitions. [2021-05-21 15:46:58,609 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6903 transitions. Word has length 95 [2021-05-21 15:46:58,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:58,609 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6903 transitions. [2021-05-21 15:46:58,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:58,609 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6903 transitions. [2021-05-21 15:46:58,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:46:58,611 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:58,611 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:58,811 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:58,811 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:58,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:58,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1590028854, now seen corresponding path program 79 times [2021-05-21 15:46:58,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:58,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463122204] [2021-05-21 15:46:58,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:58,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:58,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:58,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463122204] [2021-05-21 15:46:58,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463122204] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:58,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467399759] [2021-05-21 15:46:58,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:58,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:46:58,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:59,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467399759] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:59,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:59,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-05-21 15:46:59,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816085183] [2021-05-21 15:46:59,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:46:59,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:59,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:46:59,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:46:59,093 INFO L87 Difference]: Start difference. First operand 2488 states and 6903 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:59,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:46:59,479 INFO L93 Difference]: Finished difference Result 3556 states and 9242 transitions. [2021-05-21 15:46:59,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:46:59,479 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:46:59,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:46:59,482 INFO L225 Difference]: With dead ends: 3556 [2021-05-21 15:46:59,482 INFO L226 Difference]: Without dead ends: 3286 [2021-05-21 15:46:59,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 367.7ms TimeCoverageRelationStatistics Valid=427, Invalid=1379, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 15:46:59,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3286 states. [2021-05-21 15:46:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3286 to 2563. [2021-05-21 15:46:59,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.782201405152225) internal successors, (7128), 2562 states have internal predecessors, (7128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:59,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7128 transitions. [2021-05-21 15:46:59,510 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7128 transitions. Word has length 95 [2021-05-21 15:46:59,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:46:59,510 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7128 transitions. [2021-05-21 15:46:59,510 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:46:59,510 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7128 transitions. [2021-05-21 15:46:59,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:46:59,512 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:46:59,512 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:46:59,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:59,712 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:46:59,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:46:59,713 INFO L82 PathProgramCache]: Analyzing trace with hash -289299036, now seen corresponding path program 80 times [2021-05-21 15:46:59,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:46:59,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30116427] [2021-05-21 15:46:59,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:46:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:46:59,833 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:59,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:46:59,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30116427] [2021-05-21 15:46:59,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30116427] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:59,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432255968] [2021-05-21 15:46:59,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:46:59,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:46:59,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:46:59,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:46:59,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:46:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:46:59,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432255968] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:46:59,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:46:59,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-05-21 15:46:59,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953331752] [2021-05-21 15:46:59,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:46:59,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:46:59,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:46:59,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:46:59,986 INFO L87 Difference]: Start difference. First operand 2563 states and 7128 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:00,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:00,319 INFO L93 Difference]: Finished difference Result 3581 states and 9367 transitions. [2021-05-21 15:47:00,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:47:00,319 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:47:00,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:00,322 INFO L225 Difference]: With dead ends: 3581 [2021-05-21 15:47:00,323 INFO L226 Difference]: Without dead ends: 3311 [2021-05-21 15:47:00,323 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 328.0ms TimeCoverageRelationStatistics Valid=461, Invalid=1345, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 15:47:00,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-05-21 15:47:00,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 2638. [2021-05-21 15:47:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.78839590443686) internal successors, (7353), 2637 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:00,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7353 transitions. [2021-05-21 15:47:00,351 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7353 transitions. Word has length 95 [2021-05-21 15:47:00,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:00,351 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7353 transitions. [2021-05-21 15:47:00,351 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:00,351 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7353 transitions. [2021-05-21 15:47:00,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:47:00,353 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:00,353 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:00,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-05-21 15:47:00,554 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:00,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:00,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1741020276, now seen corresponding path program 81 times [2021-05-21 15:47:00,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:00,554 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379256262] [2021-05-21 15:47:00,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:00,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:00,661 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:00,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:00,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379256262] [2021-05-21 15:47:00,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379256262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:00,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472255799] [2021-05-21 15:47:00,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:00,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-21 15:47:00,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:00,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:47:00,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:00,828 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:00,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472255799] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:00,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:00,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-05-21 15:47:00,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876307042] [2021-05-21 15:47:00,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:47:00,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:00,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:47:00,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:47:00,829 INFO L87 Difference]: Start difference. First operand 2638 states and 7353 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:01,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:01,263 INFO L93 Difference]: Finished difference Result 3606 states and 9492 transitions. [2021-05-21 15:47:01,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:47:01,263 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:47:01,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:01,267 INFO L225 Difference]: With dead ends: 3606 [2021-05-21 15:47:01,267 INFO L226 Difference]: Without dead ends: 3336 [2021-05-21 15:47:01,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 401.1ms TimeCoverageRelationStatistics Valid=466, Invalid=1514, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 15:47:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-05-21 15:47:01,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2713. [2021-05-21 15:47:01,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7942477876106193) internal successors, (7578), 2712 states have internal predecessors, (7578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:01,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7578 transitions. [2021-05-21 15:47:01,297 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7578 transitions. Word has length 95 [2021-05-21 15:47:01,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:01,297 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7578 transitions. [2021-05-21 15:47:01,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:01,297 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7578 transitions. [2021-05-21 15:47:01,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:47:01,299 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:01,299 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:01,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:01,500 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:01,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:01,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1939707550, now seen corresponding path program 82 times [2021-05-21 15:47:01,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:01,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389598976] [2021-05-21 15:47:01,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:01,607 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:01,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:01,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389598976] [2021-05-21 15:47:01,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389598976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:01,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670139331] [2021-05-21 15:47:01,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:01,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:47:01,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:01,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:47:01,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:01,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670139331] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:01,770 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:01,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-05-21 15:47:01,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459189202] [2021-05-21 15:47:01,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:47:01,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:01,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:47:01,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:47:01,770 INFO L87 Difference]: Start difference. First operand 2713 states and 7578 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:02,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:02,137 INFO L93 Difference]: Finished difference Result 3631 states and 9617 transitions. [2021-05-21 15:47:02,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:47:02,137 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:47:02,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:02,140 INFO L225 Difference]: With dead ends: 3631 [2021-05-21 15:47:02,141 INFO L226 Difference]: Without dead ends: 3361 [2021-05-21 15:47:02,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 335.7ms TimeCoverageRelationStatistics Valid=535, Invalid=1445, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 15:47:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-05-21 15:47:02,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2788. [2021-05-21 15:47:02,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.79978471474704) internal successors, (7803), 2787 states have internal predecessors, (7803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:02,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7803 transitions. [2021-05-21 15:47:02,171 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7803 transitions. Word has length 95 [2021-05-21 15:47:02,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:02,171 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7803 transitions. [2021-05-21 15:47:02,171 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:02,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7803 transitions. [2021-05-21 15:47:02,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:47:02,173 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:02,173 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:02,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-05-21 15:47:02,374 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:02,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:02,374 INFO L82 PathProgramCache]: Analyzing trace with hash 640017458, now seen corresponding path program 83 times [2021-05-21 15:47:02,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:02,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820101894] [2021-05-21 15:47:02,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:02,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:02,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:02,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820101894] [2021-05-21 15:47:02,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820101894] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:02,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800122582] [2021-05-21 15:47:02,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:02,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-21 15:47:02,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:02,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:47:02,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:02,661 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:02,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800122582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:02,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:02,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-05-21 15:47:02,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647578946] [2021-05-21 15:47:02,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:47:02,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:02,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:47:02,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:47:02,662 INFO L87 Difference]: Start difference. First operand 2788 states and 7803 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:03,148 INFO L93 Difference]: Finished difference Result 3716 states and 9907 transitions. [2021-05-21 15:47:03,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:47:03,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:47:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:03,152 INFO L225 Difference]: With dead ends: 3716 [2021-05-21 15:47:03,152 INFO L226 Difference]: Without dead ends: 3446 [2021-05-21 15:47:03,152 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 443.3ms TimeCoverageRelationStatistics Valid=563, Invalid=1599, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:47:03,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3446 states. [2021-05-21 15:47:03,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3446 to 2863. [2021-05-21 15:47:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.8120195667365477) internal successors, (8048), 2862 states have internal predecessors, (8048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 8048 transitions. [2021-05-21 15:47:03,183 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 8048 transitions. Word has length 95 [2021-05-21 15:47:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:03,183 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 8048 transitions. [2021-05-21 15:47:03,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:03,183 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 8048 transitions. [2021-05-21 15:47:03,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:47:03,185 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:03,185 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:03,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-05-21 15:47:03,386 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:03,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:03,387 INFO L82 PathProgramCache]: Analyzing trace with hash -392630144, now seen corresponding path program 84 times [2021-05-21 15:47:03,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:03,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916016200] [2021-05-21 15:47:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:03,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:03,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:03,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916016200] [2021-05-21 15:47:03,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916016200] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:03,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502822536] [2021-05-21 15:47:03,489 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:03,546 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-21 15:47:03,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:03,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:47:03,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:03,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502822536] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:03,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:03,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-05-21 15:47:03,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792776385] [2021-05-21 15:47:03,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-21 15:47:03,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:03,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-21 15:47:03,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2021-05-21 15:47:03,643 INFO L87 Difference]: Start difference. First operand 2863 states and 8048 transitions. Second operand has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:04,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:04,048 INFO L93 Difference]: Finished difference Result 4458 states and 12031 transitions. [2021-05-21 15:47:04,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:47:04,048 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:47:04,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:04,052 INFO L225 Difference]: With dead ends: 4458 [2021-05-21 15:47:04,052 INFO L226 Difference]: Without dead ends: 4188 [2021-05-21 15:47:04,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 356.1ms TimeCoverageRelationStatistics Valid=626, Invalid=1536, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:47:04,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-05-21 15:47:04,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3043. [2021-05-21 15:47:04,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3043 states, 3042 states have (on average 2.829388560157791) internal successors, (8607), 3042 states have internal predecessors, (8607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3043 states to 3043 states and 8607 transitions. [2021-05-21 15:47:04,085 INFO L78 Accepts]: Start accepts. Automaton has 3043 states and 8607 transitions. Word has length 95 [2021-05-21 15:47:04,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:04,085 INFO L482 AbstractCegarLoop]: Abstraction has 3043 states and 8607 transitions. [2021-05-21 15:47:04,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 5.277777777777778) internal successors, (95), 18 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:04,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3043 states and 8607 transitions. [2021-05-21 15:47:04,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-21 15:47:04,087 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:04,087 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:04,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:04,288 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:04,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:04,300 INFO L82 PathProgramCache]: Analyzing trace with hash -370286894, now seen corresponding path program 85 times [2021-05-21 15:47:04,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:04,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542783660] [2021-05-21 15:47:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:04,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:04,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:04,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542783660] [2021-05-21 15:47:04,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542783660] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:04,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585376009] [2021-05-21 15:47:04,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:04,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:04,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-21 15:47:04,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:04,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585376009] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:04,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:04,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-05-21 15:47:04,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951269794] [2021-05-21 15:47:04,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:47:04,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:04,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:47:04,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:47:04,563 INFO L87 Difference]: Start difference. First operand 3043 states and 8607 transitions. Second operand has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:05,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:05,054 INFO L93 Difference]: Finished difference Result 3920 states and 10681 transitions. [2021-05-21 15:47:05,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:47:05,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-05-21 15:47:05,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:05,058 INFO L225 Difference]: With dead ends: 3920 [2021-05-21 15:47:05,058 INFO L226 Difference]: Without dead ends: 3431 [2021-05-21 15:47:05,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 455.6ms TimeCoverageRelationStatistics Valid=658, Invalid=1694, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 15:47:05,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-05-21 15:47:05,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2034. [2021-05-21 15:47:05,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.73782587309395) internal successors, (5566), 2033 states have internal predecessors, (5566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:05,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5566 transitions. [2021-05-21 15:47:05,078 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5566 transitions. Word has length 95 [2021-05-21 15:47:05,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:05,079 INFO L482 AbstractCegarLoop]: Abstraction has 2034 states and 5566 transitions. [2021-05-21 15:47:05,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.105263157894737) internal successors, (97), 19 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:05,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5566 transitions. [2021-05-21 15:47:05,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:47:05,080 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:05,080 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:05,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:05,288 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:05,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:05,288 INFO L82 PathProgramCache]: Analyzing trace with hash -2121147398, now seen corresponding path program 86 times [2021-05-21 15:47:05,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:05,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165417327] [2021-05-21 15:47:05,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:05,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:05,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165417327] [2021-05-21 15:47:05,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165417327] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:05,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836009400] [2021-05-21 15:47:05,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:05,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:47:05,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:05,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:47:05,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:05,656 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:05,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836009400] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:05,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:05,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-05-21 15:47:05,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022671694] [2021-05-21 15:47:05,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:47:05,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:05,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:47:05,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=360, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:47:05,676 INFO L87 Difference]: Start difference. First operand 2034 states and 5566 transitions. Second operand has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:05,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:05,997 INFO L93 Difference]: Finished difference Result 3024 states and 7866 transitions. [2021-05-21 15:47:05,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:47:05,997 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:47:05,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:06,000 INFO L225 Difference]: With dead ends: 3024 [2021-05-21 15:47:06,000 INFO L226 Difference]: Without dead ends: 2690 [2021-05-21 15:47:06,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 363.4ms TimeCoverageRelationStatistics Valid=445, Invalid=1277, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 15:47:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2690 states. [2021-05-21 15:47:06,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2690 to 2119. [2021-05-21 15:47:06,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2119 states, 2118 states have (on average 2.7082152974504248) internal successors, (5736), 2118 states have internal predecessors, (5736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2119 states to 2119 states and 5736 transitions. [2021-05-21 15:47:06,019 INFO L78 Accepts]: Start accepts. Automaton has 2119 states and 5736 transitions. Word has length 100 [2021-05-21 15:47:06,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:06,020 INFO L482 AbstractCegarLoop]: Abstraction has 2119 states and 5736 transitions. [2021-05-21 15:47:06,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:06,020 INFO L276 IsEmpty]: Start isEmpty. Operand 2119 states and 5736 transitions. [2021-05-21 15:47:06,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:47:06,021 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:06,021 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:06,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:06,237 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:06,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:06,237 INFO L82 PathProgramCache]: Analyzing trace with hash 93978558, now seen corresponding path program 87 times [2021-05-21 15:47:06,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:06,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979860023] [2021-05-21 15:47:06,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:06,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:06,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:06,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979860023] [2021-05-21 15:47:06,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979860023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:06,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602411666] [2021-05-21 15:47:06,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:06,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 15:47:06,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:06,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:47:06,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:06,582 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:06,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602411666] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:06,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:06,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-05-21 15:47:06,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723360299] [2021-05-21 15:47:06,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:47:06,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:06,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:47:06,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:47:06,583 INFO L87 Difference]: Start difference. First operand 2119 states and 5736 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:06,841 INFO L93 Difference]: Finished difference Result 3646 states and 9047 transitions. [2021-05-21 15:47:06,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-21 15:47:06,842 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:47:06,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:06,848 INFO L225 Difference]: With dead ends: 3646 [2021-05-21 15:47:06,848 INFO L226 Difference]: Without dead ends: 3376 [2021-05-21 15:47:06,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 289.3ms TimeCoverageRelationStatistics Valid=334, Invalid=926, Unknown=0, NotChecked=0, Total=1260 [2021-05-21 15:47:06,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2021-05-21 15:47:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 2263. [2021-05-21 15:47:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2262 states have (on average 2.720159151193634) internal successors, (6153), 2262 states have internal predecessors, (6153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:06,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 6153 transitions. [2021-05-21 15:47:06,874 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 6153 transitions. Word has length 100 [2021-05-21 15:47:06,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:06,874 INFO L482 AbstractCegarLoop]: Abstraction has 2263 states and 6153 transitions. [2021-05-21 15:47:06,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 6153 transitions. [2021-05-21 15:47:06,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:47:06,876 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:06,876 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:07,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-21 15:47:07,076 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:07,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:07,077 INFO L82 PathProgramCache]: Analyzing trace with hash 903030414, now seen corresponding path program 88 times [2021-05-21 15:47:07,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:07,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397804978] [2021-05-21 15:47:07,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:07,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:07,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397804978] [2021-05-21 15:47:07,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397804978] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:07,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612122213] [2021-05-21 15:47:07,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:07,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:47:07,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:07,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:47:07,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:07,377 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:07,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612122213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:07,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:07,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-05-21 15:47:07,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598656471] [2021-05-21 15:47:07,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 15:47:07,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:07,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 15:47:07,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:47:07,378 INFO L87 Difference]: Start difference. First operand 2263 states and 6153 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:07,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:07,686 INFO L93 Difference]: Finished difference Result 3606 states and 9042 transitions. [2021-05-21 15:47:07,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:47:07,686 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:47:07,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:07,689 INFO L225 Difference]: With dead ends: 3606 [2021-05-21 15:47:07,689 INFO L226 Difference]: Without dead ends: 3336 [2021-05-21 15:47:07,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 321.9ms TimeCoverageRelationStatistics Valid=389, Invalid=1171, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 15:47:07,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3336 states. [2021-05-21 15:47:07,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3336 to 2338. [2021-05-21 15:47:07,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2338 states, 2337 states have (on average 2.729139922978177) internal successors, (6378), 2337 states have internal predecessors, (6378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:07,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2338 states to 2338 states and 6378 transitions. [2021-05-21 15:47:07,724 INFO L78 Accepts]: Start accepts. Automaton has 2338 states and 6378 transitions. Word has length 100 [2021-05-21 15:47:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:07,724 INFO L482 AbstractCegarLoop]: Abstraction has 2338 states and 6378 transitions. [2021-05-21 15:47:07,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 2338 states and 6378 transitions. [2021-05-21 15:47:07,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:47:07,726 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:07,726 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:07,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-21 15:47:07,927 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:07,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:07,927 INFO L82 PathProgramCache]: Analyzing trace with hash -488919684, now seen corresponding path program 89 times [2021-05-21 15:47:07,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:07,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773837815] [2021-05-21 15:47:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:08,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:08,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773837815] [2021-05-21 15:47:08,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773837815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:08,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165521181] [2021-05-21 15:47:08,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:08,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 15:47:08,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:08,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:47:08,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:08,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165521181] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:08,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:08,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-05-21 15:47:08,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546434933] [2021-05-21 15:47:08,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:47:08,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:08,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:47:08,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:47:08,250 INFO L87 Difference]: Start difference. First operand 2338 states and 6378 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:08,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:08,522 INFO L93 Difference]: Finished difference Result 3656 states and 9217 transitions. [2021-05-21 15:47:08,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-21 15:47:08,523 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:47:08,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:08,526 INFO L225 Difference]: With dead ends: 3656 [2021-05-21 15:47:08,526 INFO L226 Difference]: Without dead ends: 3386 [2021-05-21 15:47:08,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=345, Invalid=1061, Unknown=0, NotChecked=0, Total=1406 [2021-05-21 15:47:08,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-05-21 15:47:08,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2413. [2021-05-21 15:47:08,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2413 states, 2412 states have (on average 2.737562189054726) internal successors, (6603), 2412 states have internal predecessors, (6603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:08,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2413 states to 2413 states and 6603 transitions. [2021-05-21 15:47:08,552 INFO L78 Accepts]: Start accepts. Automaton has 2413 states and 6603 transitions. Word has length 100 [2021-05-21 15:47:08,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:08,552 INFO L482 AbstractCegarLoop]: Abstraction has 2413 states and 6603 transitions. [2021-05-21 15:47:08,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:08,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2413 states and 6603 transitions. [2021-05-21 15:47:08,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:47:08,554 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:08,554 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:08,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-21 15:47:08,754 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:08,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:08,754 INFO L82 PathProgramCache]: Analyzing trace with hash -733996980, now seen corresponding path program 90 times [2021-05-21 15:47:08,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:08,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611577563] [2021-05-21 15:47:08,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:08,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:08,890 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:08,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:08,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611577563] [2021-05-21 15:47:08,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611577563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:08,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202951206] [2021-05-21 15:47:08,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:08,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 15:47:08,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:08,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:47:08,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:09,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202951206] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:09,074 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:09,074 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-05-21 15:47:09,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914025180] [2021-05-21 15:47:09,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 15:47:09,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:09,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 15:47:09,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:47:09,075 INFO L87 Difference]: Start difference. First operand 2413 states and 6603 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:09,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:09,421 INFO L93 Difference]: Finished difference Result 3681 states and 9342 transitions. [2021-05-21 15:47:09,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:47:09,421 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:47:09,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:09,424 INFO L225 Difference]: With dead ends: 3681 [2021-05-21 15:47:09,424 INFO L226 Difference]: Without dead ends: 3411 [2021-05-21 15:47:09,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 353.4ms TimeCoverageRelationStatistics Valid=408, Invalid=1314, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 15:47:09,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-05-21 15:47:09,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2488. [2021-05-21 15:47:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2488 states, 2487 states have (on average 2.7454764776839564) internal successors, (6828), 2487 states have internal predecessors, (6828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2488 states to 2488 states and 6828 transitions. [2021-05-21 15:47:09,449 INFO L78 Accepts]: Start accepts. Automaton has 2488 states and 6828 transitions. Word has length 100 [2021-05-21 15:47:09,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:09,449 INFO L482 AbstractCegarLoop]: Abstraction has 2488 states and 6828 transitions. [2021-05-21 15:47:09,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:09,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2488 states and 6828 transitions. [2021-05-21 15:47:09,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:47:09,451 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:09,451 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:09,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-21 15:47:09,653 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:09,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:09,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1110847302, now seen corresponding path program 91 times [2021-05-21 15:47:09,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:09,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099820337] [2021-05-21 15:47:09,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:09,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:09,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:09,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099820337] [2021-05-21 15:47:09,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099820337] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:09,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352503718] [2021-05-21 15:47:09,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:09,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:47:09,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:09,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352503718] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:09,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:09,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-05-21 15:47:09,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359272177] [2021-05-21 15:47:09,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:47:09,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:09,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:47:09,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:47:09,963 INFO L87 Difference]: Start difference. First operand 2488 states and 6828 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:10,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:10,264 INFO L93 Difference]: Finished difference Result 3706 states and 9467 transitions. [2021-05-21 15:47:10,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:47:10,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:47:10,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:10,268 INFO L225 Difference]: With dead ends: 3706 [2021-05-21 15:47:10,268 INFO L226 Difference]: Without dead ends: 3436 [2021-05-21 15:47:10,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 317.0ms TimeCoverageRelationStatistics Valid=372, Invalid=1188, Unknown=0, NotChecked=0, Total=1560 [2021-05-21 15:47:10,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3436 states. [2021-05-21 15:47:10,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3436 to 2563. [2021-05-21 15:47:10,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2563 states, 2562 states have (on average 2.752927400468384) internal successors, (7053), 2562 states have internal predecessors, (7053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:10,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2563 states to 2563 states and 7053 transitions. [2021-05-21 15:47:10,295 INFO L78 Accepts]: Start accepts. Automaton has 2563 states and 7053 transitions. Word has length 100 [2021-05-21 15:47:10,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:10,295 INFO L482 AbstractCegarLoop]: Abstraction has 2563 states and 7053 transitions. [2021-05-21 15:47:10,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2563 states and 7053 transitions. [2021-05-21 15:47:10,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:47:10,297 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:10,297 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:10,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-21 15:47:10,498 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:10,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:10,498 INFO L82 PathProgramCache]: Analyzing trace with hash 215908234, now seen corresponding path program 92 times [2021-05-21 15:47:10,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:10,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321606039] [2021-05-21 15:47:10,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:10,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:10,625 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:10,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:10,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321606039] [2021-05-21 15:47:10,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321606039] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:10,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826320289] [2021-05-21 15:47:10,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:10,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:47:10,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:10,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:47:10,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:10,803 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:10,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826320289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:10,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:10,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-05-21 15:47:10,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593078071] [2021-05-21 15:47:10,804 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 15:47:10,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:10,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 15:47:10,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:47:10,804 INFO L87 Difference]: Start difference. First operand 2563 states and 7053 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:11,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:11,200 INFO L93 Difference]: Finished difference Result 3731 states and 9592 transitions. [2021-05-21 15:47:11,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:47:11,201 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:47:11,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:11,204 INFO L225 Difference]: With dead ends: 3731 [2021-05-21 15:47:11,204 INFO L226 Difference]: Without dead ends: 3461 [2021-05-21 15:47:11,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 389.5ms TimeCoverageRelationStatistics Valid=443, Invalid=1449, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 15:47:11,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-05-21 15:47:11,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 2638. [2021-05-21 15:47:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2638 states, 2637 states have (on average 2.7599544937428897) internal successors, (7278), 2637 states have internal predecessors, (7278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:11,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2638 states to 2638 states and 7278 transitions. [2021-05-21 15:47:11,232 INFO L78 Accepts]: Start accepts. Automaton has 2638 states and 7278 transitions. Word has length 100 [2021-05-21 15:47:11,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:11,232 INFO L482 AbstractCegarLoop]: Abstraction has 2638 states and 7278 transitions. [2021-05-21 15:47:11,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 2638 states and 7278 transitions. [2021-05-21 15:47:11,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:47:11,234 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:11,234 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:11,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-05-21 15:47:11,436 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:11,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:11,436 INFO L82 PathProgramCache]: Analyzing trace with hash 670124408, now seen corresponding path program 93 times [2021-05-21 15:47:11,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:11,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185730077] [2021-05-21 15:47:11,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:11,556 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:11,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:11,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185730077] [2021-05-21 15:47:11,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185730077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:11,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769681586] [2021-05-21 15:47:11,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:11,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 15:47:11,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:11,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:47:11,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:11,729 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:11,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769681586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:11,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:11,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-05-21 15:47:11,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746901057] [2021-05-21 15:47:11,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:47:11,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:11,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:47:11,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:47:11,730 INFO L87 Difference]: Start difference. First operand 2638 states and 7278 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:12,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:12,070 INFO L93 Difference]: Finished difference Result 3756 states and 9717 transitions. [2021-05-21 15:47:12,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:47:12,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:47:12,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:12,074 INFO L225 Difference]: With dead ends: 3756 [2021-05-21 15:47:12,074 INFO L226 Difference]: Without dead ends: 3486 [2021-05-21 15:47:12,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 328.7ms TimeCoverageRelationStatistics Valid=415, Invalid=1307, Unknown=0, NotChecked=0, Total=1722 [2021-05-21 15:47:12,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3486 states. [2021-05-21 15:47:12,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3486 to 2713. [2021-05-21 15:47:12,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7665929203539825) internal successors, (7503), 2712 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:12,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7503 transitions. [2021-05-21 15:47:12,102 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7503 transitions. Word has length 100 [2021-05-21 15:47:12,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:12,102 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7503 transitions. [2021-05-21 15:47:12,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:12,103 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7503 transitions. [2021-05-21 15:47:12,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:47:12,104 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:12,104 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:12,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-05-21 15:47:12,305 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:12,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:12,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1669020744, now seen corresponding path program 94 times [2021-05-21 15:47:12,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:12,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053649143] [2021-05-21 15:47:12,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:12,428 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:12,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:12,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053649143] [2021-05-21 15:47:12,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053649143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:12,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415583348] [2021-05-21 15:47:12,428 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:12,480 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:47:12,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:12,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:47:12,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:12,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415583348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:12,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:12,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-05-21 15:47:12,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113150031] [2021-05-21 15:47:12,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 15:47:12,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:12,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 15:47:12,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:47:12,597 INFO L87 Difference]: Start difference. First operand 2713 states and 7503 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:13,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:13,045 INFO L93 Difference]: Finished difference Result 3781 states and 9842 transitions. [2021-05-21 15:47:13,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:47:13,045 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:47:13,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:13,049 INFO L225 Difference]: With dead ends: 3781 [2021-05-21 15:47:13,049 INFO L226 Difference]: Without dead ends: 3511 [2021-05-21 15:47:13,049 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 425.0ms TimeCoverageRelationStatistics Valid=494, Invalid=1576, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 15:47:13,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3511 states. [2021-05-21 15:47:13,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3511 to 2788. [2021-05-21 15:47:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.772874058127018) internal successors, (7728), 2787 states have internal predecessors, (7728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7728 transitions. [2021-05-21 15:47:13,080 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7728 transitions. Word has length 100 [2021-05-21 15:47:13,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:13,080 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7728 transitions. [2021-05-21 15:47:13,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:13,080 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7728 transitions. [2021-05-21 15:47:13,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:47:13,082 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:13,082 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:13,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:13,283 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:13,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:13,283 INFO L82 PathProgramCache]: Analyzing trace with hash -210307146, now seen corresponding path program 95 times [2021-05-21 15:47:13,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:13,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677918772] [2021-05-21 15:47:13,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:13,400 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:13,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:13,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677918772] [2021-05-21 15:47:13,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677918772] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:13,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896291725] [2021-05-21 15:47:13,401 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:13,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 15:47:13,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:13,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:47:13,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:13,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896291725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:13,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:13,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-05-21 15:47:13,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080981563] [2021-05-21 15:47:13,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:47:13,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:13,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:47:13,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:47:13,569 INFO L87 Difference]: Start difference. First operand 2788 states and 7728 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:13,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:13,953 INFO L93 Difference]: Finished difference Result 3806 states and 9967 transitions. [2021-05-21 15:47:13,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:47:13,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:47:13,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:13,957 INFO L225 Difference]: With dead ends: 3806 [2021-05-21 15:47:13,957 INFO L226 Difference]: Without dead ends: 3536 [2021-05-21 15:47:13,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 344.6ms TimeCoverageRelationStatistics Valid=474, Invalid=1418, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 15:47:13,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3536 states. [2021-05-21 15:47:13,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3536 to 2863. [2021-05-21 15:47:13,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.7788259958071277) internal successors, (7953), 2862 states have internal predecessors, (7953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:13,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7953 transitions. [2021-05-21 15:47:13,990 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7953 transitions. Word has length 100 [2021-05-21 15:47:13,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:13,990 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7953 transitions. [2021-05-21 15:47:13,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:13,990 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7953 transitions. [2021-05-21 15:47:13,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:47:13,992 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:13,992 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:14,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-05-21 15:47:14,205 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:14,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:14,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1820012166, now seen corresponding path program 96 times [2021-05-21 15:47:14,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:14,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975688462] [2021-05-21 15:47:14,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:14,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:14,320 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:14,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:14,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975688462] [2021-05-21 15:47:14,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975688462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:14,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931158455] [2021-05-21 15:47:14,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:14,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 15:47:14,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:14,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:47:14,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:14,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931158455] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:14,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:14,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-05-21 15:47:14,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888666348] [2021-05-21 15:47:14,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 15:47:14,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:14,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 15:47:14,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:47:14,493 INFO L87 Difference]: Start difference. First operand 2863 states and 7953 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:14,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:14,945 INFO L93 Difference]: Finished difference Result 3831 states and 10092 transitions. [2021-05-21 15:47:14,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:47:14,946 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:47:14,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:14,949 INFO L225 Difference]: With dead ends: 3831 [2021-05-21 15:47:14,949 INFO L226 Difference]: Without dead ends: 3561 [2021-05-21 15:47:14,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 417.8ms TimeCoverageRelationStatistics Valid=476, Invalid=1594, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 15:47:14,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3561 states. [2021-05-21 15:47:14,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3561 to 2938. [2021-05-21 15:47:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.7844739530132787) internal successors, (8178), 2937 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:14,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8178 transitions. [2021-05-21 15:47:14,980 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8178 transitions. Word has length 100 [2021-05-21 15:47:14,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:14,981 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8178 transitions. [2021-05-21 15:47:14,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:14,981 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8178 transitions. [2021-05-21 15:47:14,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:47:14,983 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:14,983 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:15,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:15,183 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:15,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:15,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1860715660, now seen corresponding path program 97 times [2021-05-21 15:47:15,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:15,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729928760] [2021-05-21 15:47:15,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:15,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:15,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729928760] [2021-05-21 15:47:15,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729928760] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:15,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644872191] [2021-05-21 15:47:15,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:15,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:15,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:47:15,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:15,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644872191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:15,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:15,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-05-21 15:47:15,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473374900] [2021-05-21 15:47:15,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:47:15,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:15,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:47:15,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:47:15,458 INFO L87 Difference]: Start difference. First operand 2938 states and 8178 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:15,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:15,861 INFO L93 Difference]: Finished difference Result 3856 states and 10217 transitions. [2021-05-21 15:47:15,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:47:15,862 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:47:15,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:15,865 INFO L225 Difference]: With dead ends: 3856 [2021-05-21 15:47:15,865 INFO L226 Difference]: Without dead ends: 3586 [2021-05-21 15:47:15,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 373.3ms TimeCoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 15:47:15,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3586 states. [2021-05-21 15:47:15,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3586 to 3013. [2021-05-21 15:47:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.789840637450199) internal successors, (8403), 3012 states have internal predecessors, (8403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8403 transitions. [2021-05-21 15:47:15,897 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8403 transitions. Word has length 100 [2021-05-21 15:47:15,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:15,897 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8403 transitions. [2021-05-21 15:47:15,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:15,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8403 transitions. [2021-05-21 15:47:15,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:47:15,899 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:15,899 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:16,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-05-21 15:47:16,099 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:16,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:16,100 INFO L82 PathProgramCache]: Analyzing trace with hash 719009348, now seen corresponding path program 98 times [2021-05-21 15:47:16,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:16,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432293608] [2021-05-21 15:47:16,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:16,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:16,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432293608] [2021-05-21 15:47:16,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432293608] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:16,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093263867] [2021-05-21 15:47:16,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:16,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:47:16,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:16,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:47:16,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:16,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093263867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:16,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:16,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-05-21 15:47:16,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094964646] [2021-05-21 15:47:16,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-21 15:47:16,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:16,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-21 15:47:16,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-05-21 15:47:16,385 INFO L87 Difference]: Start difference. First operand 3013 states and 8403 transitions. Second operand has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:16,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:16,923 INFO L93 Difference]: Finished difference Result 3941 states and 10507 transitions. [2021-05-21 15:47:16,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:47:16,923 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:47:16,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:16,927 INFO L225 Difference]: With dead ends: 3941 [2021-05-21 15:47:16,927 INFO L226 Difference]: Without dead ends: 3671 [2021-05-21 15:47:16,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 493.1ms TimeCoverageRelationStatistics Valid=644, Invalid=1806, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 15:47:16,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3671 states. [2021-05-21 15:47:16,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3671 to 3088. [2021-05-21 15:47:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.801425332037577) internal successors, (8648), 3087 states have internal predecessors, (8648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8648 transitions. [2021-05-21 15:47:16,966 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8648 transitions. Word has length 100 [2021-05-21 15:47:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:16,966 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8648 transitions. [2021-05-21 15:47:16,966 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 5.1) internal successors, (102), 20 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:16,966 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8648 transitions. [2021-05-21 15:47:16,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:47:16,968 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:16,968 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:17,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:17,183 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:17,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:17,183 INFO L82 PathProgramCache]: Analyzing trace with hash -313638254, now seen corresponding path program 99 times [2021-05-21 15:47:17,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:17,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126869371] [2021-05-21 15:47:17,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:17,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:17,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126869371] [2021-05-21 15:47:17,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126869371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:17,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757369182] [2021-05-21 15:47:17,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:17,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 15:47:17,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:17,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:47:17,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:17,449 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:17,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757369182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:17,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:17,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-05-21 15:47:17,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796267019] [2021-05-21 15:47:17,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-21 15:47:17,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:17,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-21 15:47:17,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-05-21 15:47:17,450 INFO L87 Difference]: Start difference. First operand 3088 states and 8648 transitions. Second operand has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:17,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:17,900 INFO L93 Difference]: Finished difference Result 4708 states and 12681 transitions. [2021-05-21 15:47:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:47:17,900 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:47:17,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:17,904 INFO L225 Difference]: With dead ends: 4708 [2021-05-21 15:47:17,904 INFO L226 Difference]: Without dead ends: 4438 [2021-05-21 15:47:17,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 384.7ms TimeCoverageRelationStatistics Valid=641, Invalid=1615, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 15:47:17,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4438 states. [2021-05-21 15:47:17,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4438 to 3268. [2021-05-21 15:47:17,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3268 states, 3267 states have (on average 2.8181818181818183) internal successors, (9207), 3267 states have internal predecessors, (9207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:17,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3268 states to 3268 states and 9207 transitions. [2021-05-21 15:47:17,938 INFO L78 Accepts]: Start accepts. Automaton has 3268 states and 9207 transitions. Word has length 100 [2021-05-21 15:47:17,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:17,938 INFO L482 AbstractCegarLoop]: Abstraction has 3268 states and 9207 transitions. [2021-05-21 15:47:17,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.2631578947368425) internal successors, (100), 19 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:17,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3268 states and 9207 transitions. [2021-05-21 15:47:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-21 15:47:17,940 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:17,940 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:18,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-05-21 15:47:18,141 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:18,141 INFO L82 PathProgramCache]: Analyzing trace with hash -291295004, now seen corresponding path program 100 times [2021-05-21 15:47:18,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:18,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897828762] [2021-05-21 15:47:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:18,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:18,258 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:18,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:18,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897828762] [2021-05-21 15:47:18,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897828762] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:18,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055374804] [2021-05-21 15:47:18,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:18,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:47:18,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:18,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 15:47:18,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:18,444 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:18,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055374804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:18,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:18,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-05-21 15:47:18,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131175190] [2021-05-21 15:47:18,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:47:18,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:18,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:47:18,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:47:18,445 INFO L87 Difference]: Start difference. First operand 3268 states and 9207 transitions. Second operand has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:19,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:19,052 INFO L93 Difference]: Finished difference Result 4651 states and 12541 transitions. [2021-05-21 15:47:19,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:47:19,052 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-05-21 15:47:19,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:19,057 INFO L225 Difference]: With dead ends: 4651 [2021-05-21 15:47:19,057 INFO L226 Difference]: Without dead ends: 4076 [2021-05-21 15:47:19,057 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 571.4ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 15:47:19,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-05-21 15:47:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-05-21 15:47:19,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:47:19,088 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 100 [2021-05-21 15:47:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:19,089 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:47:19,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.904761904761905) internal successors, (103), 21 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:19,089 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:47:19,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:47:19,091 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:19,091 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:19,291 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-05-21 15:47:19,291 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:19,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:19,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1356878341, now seen corresponding path program 101 times [2021-05-21 15:47:19,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:19,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084656998] [2021-05-21 15:47:19,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:19,438 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:19,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:19,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084656998] [2021-05-21 15:47:19,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084656998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:19,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727803689] [2021-05-21 15:47:19,439 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:19,507 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 15:47:19,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:19,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:47:19,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:19,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727803689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:19,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:19,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-05-21 15:47:19,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392744510] [2021-05-21 15:47:19,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:47:19,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:19,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:47:19,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:47:19,635 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:19,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:19,914 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-05-21 15:47:19,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:47:19,914 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:47:19,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:19,918 INFO L225 Difference]: With dead ends: 4346 [2021-05-21 15:47:19,918 INFO L226 Difference]: Without dead ends: 4076 [2021-05-21 15:47:19,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 311.5ms TimeCoverageRelationStatistics Valid=416, Invalid=1224, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 15:47:19,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-05-21 15:47:19,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-05-21 15:47:19,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:19,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:47:19,950 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:47:19,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:19,950 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:47:19,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:19,950 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:47:19,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:47:19,952 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:19,952 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:20,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-05-21 15:47:20,153 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:20,153 INFO L82 PathProgramCache]: Analyzing trace with hash -547826485, now seen corresponding path program 102 times [2021-05-21 15:47:20,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:20,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904314700] [2021-05-21 15:47:20,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:20,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:20,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:20,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904314700] [2021-05-21 15:47:20,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904314700] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:20,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646845643] [2021-05-21 15:47:20,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:20,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 15:47:20,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:20,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:47:20,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:20,511 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:20,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [646845643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:20,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:20,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-05-21 15:47:20,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859586880] [2021-05-21 15:47:20,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:47:20,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:20,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:47:20,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:47:20,512 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:20,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:20,846 INFO L93 Difference]: Finished difference Result 4641 states and 12087 transitions. [2021-05-21 15:47:20,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:47:20,846 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:47:20,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:20,850 INFO L225 Difference]: With dead ends: 4641 [2021-05-21 15:47:20,850 INFO L226 Difference]: Without dead ends: 4371 [2021-05-21 15:47:20,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 377.2ms TimeCoverageRelationStatistics Valid=465, Invalid=1427, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 15:47:20,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4371 states. [2021-05-21 15:47:20,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4371 to 3303. [2021-05-21 15:47:20,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:20,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:47:20,881 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:47:20,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:20,882 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:47:20,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:20,882 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:47:20,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:47:20,884 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:20,884 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:21,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:21,084 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:21,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:21,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1939776583, now seen corresponding path program 103 times [2021-05-21 15:47:21,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:21,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618843921] [2021-05-21 15:47:21,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:21,219 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:21,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:21,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618843921] [2021-05-21 15:47:21,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618843921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:21,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145236982] [2021-05-21 15:47:21,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:21,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:21,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:47:21,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:21,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145236982] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:21,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:21,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-05-21 15:47:21,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595305222] [2021-05-21 15:47:21,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:47:21,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:21,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:47:21,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:47:21,416 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:21,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:21,729 INFO L93 Difference]: Finished difference Result 4596 states and 11997 transitions. [2021-05-21 15:47:21,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:47:21,729 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:47:21,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:21,733 INFO L225 Difference]: With dead ends: 4596 [2021-05-21 15:47:21,733 INFO L226 Difference]: Without dead ends: 4326 [2021-05-21 15:47:21,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=467, Invalid=1425, Unknown=0, NotChecked=0, Total=1892 [2021-05-21 15:47:21,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-05-21 15:47:21,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3303. [2021-05-21 15:47:21,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:21,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:47:21,767 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:47:21,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:21,767 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:47:21,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:21,767 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:47:21,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:47:21,769 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:21,769 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:21,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-05-21 15:47:21,970 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:21,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:21,970 INFO L82 PathProgramCache]: Analyzing trace with hash 2110113417, now seen corresponding path program 104 times [2021-05-21 15:47:21,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:21,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137017066] [2021-05-21 15:47:21,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:22,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:22,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137017066] [2021-05-21 15:47:22,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137017066] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:22,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353023939] [2021-05-21 15:47:22,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:22,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:47:22,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:22,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:47:22,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:22,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353023939] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:22,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:22,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-05-21 15:47:22,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400411364] [2021-05-21 15:47:22,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:47:22,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:22,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:47:22,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:47:22,351 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:22,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:22,734 INFO L93 Difference]: Finished difference Result 4546 states and 11897 transitions. [2021-05-21 15:47:22,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:47:22,734 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:47:22,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:22,739 INFO L225 Difference]: With dead ends: 4546 [2021-05-21 15:47:22,739 INFO L226 Difference]: Without dead ends: 4276 [2021-05-21 15:47:22,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 407.0ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 15:47:22,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-05-21 15:47:22,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3303. [2021-05-21 15:47:22,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:47:22,775 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:47:22,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:22,775 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:47:22,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:22,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:47:22,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:47:22,778 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:22,778 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:22,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:22,978 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:22,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:22,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1733263095, now seen corresponding path program 105 times [2021-05-21 15:47:22,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:22,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680930778] [2021-05-21 15:47:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:23,108 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:23,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:23,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680930778] [2021-05-21 15:47:23,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680930778] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:23,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971579535] [2021-05-21 15:47:23,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:23,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 15:47:23,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:23,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:47:23,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:23,308 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:23,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971579535] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:23,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:23,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-05-21 15:47:23,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556306585] [2021-05-21 15:47:23,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:47:23,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:23,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:47:23,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:47:23,309 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:23,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:23,666 INFO L93 Difference]: Finished difference Result 4496 states and 11797 transitions. [2021-05-21 15:47:23,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:47:23,666 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:47:23,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:23,671 INFO L225 Difference]: With dead ends: 4496 [2021-05-21 15:47:23,671 INFO L226 Difference]: Without dead ends: 4226 [2021-05-21 15:47:23,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 356.6ms TimeCoverageRelationStatistics Valid=506, Invalid=1564, Unknown=0, NotChecked=0, Total=2070 [2021-05-21 15:47:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-05-21 15:47:23,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3303. [2021-05-21 15:47:23,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:23,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:47:23,709 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:47:23,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:23,709 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:47:23,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:23,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:47:23,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:47:23,711 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:23,712 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:23,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-05-21 15:47:23,913 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:23,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:23,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1234948665, now seen corresponding path program 106 times [2021-05-21 15:47:23,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:23,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87236085] [2021-05-21 15:47:23,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:24,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:24,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87236085] [2021-05-21 15:47:24,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87236085] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:24,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943129434] [2021-05-21 15:47:24,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:24,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:47:24,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:24,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:47:24,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:24,245 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:24,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943129434] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:24,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:24,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-05-21 15:47:24,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077591291] [2021-05-21 15:47:24,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:47:24,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:24,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:47:24,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:47:24,246 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:24,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:24,697 INFO L93 Difference]: Finished difference Result 4446 states and 11697 transitions. [2021-05-21 15:47:24,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:47:24,697 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:47:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:24,701 INFO L225 Difference]: With dead ends: 4446 [2021-05-21 15:47:24,701 INFO L226 Difference]: Without dead ends: 4176 [2021-05-21 15:47:24,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 457.1ms TimeCoverageRelationStatistics Valid=531, Invalid=1725, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 15:47:24,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-05-21 15:47:24,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3303. [2021-05-21 15:47:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:47:24,739 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:47:24,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:24,740 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:47:24,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:24,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:47:24,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:47:24,742 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:24,742 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:24,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-05-21 15:47:24,942 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:24,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:24,943 INFO L82 PathProgramCache]: Analyzing trace with hash -780732491, now seen corresponding path program 107 times [2021-05-21 15:47:24,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:24,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557518494] [2021-05-21 15:47:24,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:25,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:25,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557518494] [2021-05-21 15:47:25,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557518494] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:25,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431170512] [2021-05-21 15:47:25,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:25,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 15:47:25,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:25,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:47:25,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:25,271 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:25,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431170512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:25,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:25,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-05-21 15:47:25,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000247939] [2021-05-21 15:47:25,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:47:25,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:25,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:47:25,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:47:25,272 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:25,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:25,660 INFO L93 Difference]: Finished difference Result 4396 states and 11597 transitions. [2021-05-21 15:47:25,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:47:25,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:47:25,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:25,665 INFO L225 Difference]: With dead ends: 4396 [2021-05-21 15:47:25,665 INFO L226 Difference]: Without dead ends: 4126 [2021-05-21 15:47:25,665 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 375.8ms TimeCoverageRelationStatistics Valid=561, Invalid=1695, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 15:47:25,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-05-21 15:47:25,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3303. [2021-05-21 15:47:25,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:25,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:47:25,700 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:47:25,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:25,700 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:47:25,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:47:25,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:47:25,702 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:25,702 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:25,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-05-21 15:47:25,903 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:25,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:25,903 INFO L82 PathProgramCache]: Analyzing trace with hash 218163845, now seen corresponding path program 108 times [2021-05-21 15:47:25,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:25,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449782998] [2021-05-21 15:47:25,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:25,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:26,024 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:26,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:26,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449782998] [2021-05-21 15:47:26,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449782998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:26,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77286216] [2021-05-21 15:47:26,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:26,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 15:47:26,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:26,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:47:26,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:26,249 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:26,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77286216] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:26,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:26,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-05-21 15:47:26,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22507340] [2021-05-21 15:47:26,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:47:26,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:26,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:47:26,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:47:26,250 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:26,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:26,745 INFO L93 Difference]: Finished difference Result 4346 states and 11497 transitions. [2021-05-21 15:47:26,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:47:26,745 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:47:26,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:26,750 INFO L225 Difference]: With dead ends: 4346 [2021-05-21 15:47:26,750 INFO L226 Difference]: Without dead ends: 4076 [2021-05-21 15:47:26,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 464.6ms TimeCoverageRelationStatistics Valid=588, Invalid=1862, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 15:47:26,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-05-21 15:47:26,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3303. [2021-05-21 15:47:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:26,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:47:26,783 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:47:26,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:26,784 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:47:26,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:26,784 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:47:26,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:47:26,786 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:26,786 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:26,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:26,987 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:26,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:26,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1661164045, now seen corresponding path program 109 times [2021-05-21 15:47:26,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:26,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326359053] [2021-05-21 15:47:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:27,125 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:27,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:27,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326359053] [2021-05-21 15:47:27,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326359053] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:27,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40784171] [2021-05-21 15:47:27,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:27,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:27,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:47:27,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:27,301 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:27,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40784171] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:27,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:27,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-05-21 15:47:27,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546773677] [2021-05-21 15:47:27,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:47:27,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:27,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:47:27,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:47:27,302 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:27,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:27,729 INFO L93 Difference]: Finished difference Result 4296 states and 11397 transitions. [2021-05-21 15:47:27,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:47:27,729 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:47:27,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:27,733 INFO L225 Difference]: With dead ends: 4296 [2021-05-21 15:47:27,733 INFO L226 Difference]: Without dead ends: 4026 [2021-05-21 15:47:27,733 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 416.4ms TimeCoverageRelationStatistics Valid=632, Invalid=1818, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 15:47:27,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-05-21 15:47:27,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-05-21 15:47:27,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:47:27,769 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:47:27,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:27,769 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:47:27,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:27,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:47:27,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:47:27,771 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:27,772 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:27,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:27,972 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:27,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:27,972 INFO L82 PathProgramCache]: Analyzing trace with hash 369155267, now seen corresponding path program 110 times [2021-05-21 15:47:27,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:27,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194848632] [2021-05-21 15:47:27,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:28,098 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:28,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:28,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194848632] [2021-05-21 15:47:28,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194848632] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:28,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461465890] [2021-05-21 15:47:28,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:28,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:47:28,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:28,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:47:28,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:28,290 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:28,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461465890] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:28,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:28,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-05-21 15:47:28,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685547675] [2021-05-21 15:47:28,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:47:28,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:28,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:47:28,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:47:28,291 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:28,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:28,826 INFO L93 Difference]: Finished difference Result 4246 states and 11297 transitions. [2021-05-21 15:47:28,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:47:28,827 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:47:28,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:28,830 INFO L225 Difference]: With dead ends: 4246 [2021-05-21 15:47:28,831 INFO L226 Difference]: Without dead ends: 3976 [2021-05-21 15:47:28,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 506.0ms TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 15:47:28,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-05-21 15:47:28,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3303. [2021-05-21 15:47:28,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:28,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:47:28,879 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:47:28,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:28,879 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:47:28,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:28,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:47:28,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:47:28,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:28,881 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:29,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:29,089 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:29,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:29,089 INFO L82 PathProgramCache]: Analyzing trace with hash 983394737, now seen corresponding path program 111 times [2021-05-21 15:47:29,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:29,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454500078] [2021-05-21 15:47:29,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:29,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:29,208 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:29,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:29,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454500078] [2021-05-21 15:47:29,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454500078] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:29,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541419606] [2021-05-21 15:47:29,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:29,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-21 15:47:29,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:29,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:47:29,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:29,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541419606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:29,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:29,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-05-21 15:47:29,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759881439] [2021-05-21 15:47:29,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:47:29,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:29,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:47:29,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:47:29,387 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:29,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:29,852 INFO L93 Difference]: Finished difference Result 4196 states and 11197 transitions. [2021-05-21 15:47:29,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:47:29,852 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:47:29,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:29,856 INFO L225 Difference]: With dead ends: 4196 [2021-05-21 15:47:29,856 INFO L226 Difference]: Without dead ends: 3926 [2021-05-21 15:47:29,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 434.2ms TimeCoverageRelationStatistics Valid=719, Invalid=1933, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 15:47:29,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-05-21 15:47:29,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3303. [2021-05-21 15:47:29,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.811326468806784) internal successors, (9283), 3302 states have internal predecessors, (9283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:29,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9283 transitions. [2021-05-21 15:47:29,890 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9283 transitions. Word has length 105 [2021-05-21 15:47:29,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:29,890 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9283 transitions. [2021-05-21 15:47:29,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:29,890 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9283 transitions. [2021-05-21 15:47:29,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:47:29,892 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:29,892 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:30,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-05-21 15:47:30,093 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:30,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:30,093 INFO L82 PathProgramCache]: Analyzing trace with hash -731847551, now seen corresponding path program 112 times [2021-05-21 15:47:30,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:30,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381007121] [2021-05-21 15:47:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:30,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:30,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:30,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381007121] [2021-05-21 15:47:30,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381007121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:30,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080213268] [2021-05-21 15:47:30,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:30,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:47:30,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:30,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:47:30,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:30,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080213268] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:30,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:30,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-05-21 15:47:30,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947462547] [2021-05-21 15:47:30,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:47:30,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:30,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:47:30,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:47:30,396 INFO L87 Difference]: Start difference. First operand 3303 states and 9283 transitions. Second operand has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:30,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:30,985 INFO L93 Difference]: Finished difference Result 4206 states and 11247 transitions. [2021-05-21 15:47:30,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:47:30,986 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:47:30,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:30,989 INFO L225 Difference]: With dead ends: 4206 [2021-05-21 15:47:30,989 INFO L226 Difference]: Without dead ends: 3936 [2021-05-21 15:47:30,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 531.4ms TimeCoverageRelationStatistics Valid=750, Invalid=2112, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 15:47:30,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3936 states. [2021-05-21 15:47:31,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3936 to 3303. [2021-05-21 15:47:31,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.812840702604482) internal successors, (9288), 3302 states have internal predecessors, (9288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:31,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9288 transitions. [2021-05-21 15:47:31,020 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9288 transitions. Word has length 105 [2021-05-21 15:47:31,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:31,020 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9288 transitions. [2021-05-21 15:47:31,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.954545454545454) internal successors, (109), 22 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:31,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9288 transitions. [2021-05-21 15:47:31,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:47:31,022 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:31,022 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:31,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-05-21 15:47:31,229 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:31,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:31,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1764495153, now seen corresponding path program 113 times [2021-05-21 15:47:31,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:31,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354707035] [2021-05-21 15:47:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:31,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:31,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354707035] [2021-05-21 15:47:31,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354707035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:31,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083212466] [2021-05-21 15:47:31,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:31,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-05-21 15:47:31,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:31,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-21 15:47:31,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:31,516 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:31,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083212466] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:31,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:31,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-05-21 15:47:31,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359512831] [2021-05-21 15:47:31,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-21 15:47:31,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:31,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-21 15:47:31,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-05-21 15:47:31,517 INFO L87 Difference]: Start difference. First operand 3303 states and 9288 transitions. Second operand has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:32,000 INFO L93 Difference]: Finished difference Result 4948 states and 13371 transitions. [2021-05-21 15:47:32,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:47:32,000 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:47:32,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:32,005 INFO L225 Difference]: With dead ends: 4948 [2021-05-21 15:47:32,005 INFO L226 Difference]: Without dead ends: 4678 [2021-05-21 15:47:32,006 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 438.0ms TimeCoverageRelationStatistics Valid=823, Invalid=2039, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 15:47:32,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4678 states. [2021-05-21 15:47:32,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4678 to 3483. [2021-05-21 15:47:32,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3483 states, 3482 states have (on average 2.827972429638139) internal successors, (9847), 3482 states have internal predecessors, (9847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:32,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3483 states to 3483 states and 9847 transitions. [2021-05-21 15:47:32,042 INFO L78 Accepts]: Start accepts. Automaton has 3483 states and 9847 transitions. Word has length 105 [2021-05-21 15:47:32,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:32,042 INFO L482 AbstractCegarLoop]: Abstraction has 3483 states and 9847 transitions. [2021-05-21 15:47:32,042 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.095238095238095) internal successors, (107), 21 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:32,042 INFO L276 IsEmpty]: Start isEmpty. Operand 3483 states and 9847 transitions. [2021-05-21 15:47:32,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-21 15:47:32,044 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:32,045 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:32,245 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-05-21 15:47:32,245 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:32,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:32,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1742151903, now seen corresponding path program 114 times [2021-05-21 15:47:32,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:32,246 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392328182] [2021-05-21 15:47:32,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:32,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:32,363 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:32,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:32,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392328182] [2021-05-21 15:47:32,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392328182] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:32,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364734142] [2021-05-21 15:47:32,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:32,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-21 15:47:32,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:32,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:47:32,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 0 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:32,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364734142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:32,549 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:32,549 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-05-21 15:47:32,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666818999] [2021-05-21 15:47:32,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:47:32,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:32,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:47:32,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:47:32,549 INFO L87 Difference]: Start difference. First operand 3483 states and 9847 transitions. Second operand has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:33,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:33,183 INFO L93 Difference]: Finished difference Result 4816 states and 13036 transitions. [2021-05-21 15:47:33,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:47:33,183 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-05-21 15:47:33,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:33,187 INFO L225 Difference]: With dead ends: 4816 [2021-05-21 15:47:33,187 INFO L226 Difference]: Without dead ends: 4241 [2021-05-21 15:47:33,188 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 879 ImplicationChecksByTransitivity, 585.2ms TimeCoverageRelationStatistics Valid=830, Invalid=2592, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:47:33,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4241 states. [2021-05-21 15:47:33,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4241 to 2324. [2021-05-21 15:47:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2324 states, 2323 states have (on average 2.7361170899698664) internal successors, (6356), 2323 states have internal predecessors, (6356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:33,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2324 states to 2324 states and 6356 transitions. [2021-05-21 15:47:33,214 INFO L78 Accepts]: Start accepts. Automaton has 2324 states and 6356 transitions. Word has length 105 [2021-05-21 15:47:33,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:33,214 INFO L482 AbstractCegarLoop]: Abstraction has 2324 states and 6356 transitions. [2021-05-21 15:47:33,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 4.909090909090909) internal successors, (108), 22 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:33,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2324 states and 6356 transitions. [2021-05-21 15:47:33,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:33,216 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:33,216 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:33,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-05-21 15:47:33,416 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:33,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:33,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1657780875, now seen corresponding path program 115 times [2021-05-21 15:47:33,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:33,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896681131] [2021-05-21 15:47:33,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:33,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:33,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896681131] [2021-05-21 15:47:33,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896681131] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:33,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276227354] [2021-05-21 15:47:33,595 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:33,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:47:33,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:33,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276227354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:33,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:33,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 25 [2021-05-21 15:47:33,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920427198] [2021-05-21 15:47:33,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:47:33,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:33,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:47:33,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:47:33,809 INFO L87 Difference]: Start difference. First operand 2324 states and 6356 transitions. Second operand has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:34,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:34,196 INFO L93 Difference]: Finished difference Result 3364 states and 8756 transitions. [2021-05-21 15:47:34,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:47:34,197 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:34,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:34,200 INFO L225 Difference]: With dead ends: 3364 [2021-05-21 15:47:34,200 INFO L226 Difference]: Without dead ends: 3030 [2021-05-21 15:47:34,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 414.6ms TimeCoverageRelationStatistics Valid=572, Invalid=1590, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:47:34,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3030 states. [2021-05-21 15:47:34,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3030 to 2409. [2021-05-21 15:47:34,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2409 states, 2408 states have (on average 2.7101328903654487) internal successors, (6526), 2408 states have internal predecessors, (6526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:34,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2409 states to 2409 states and 6526 transitions. [2021-05-21 15:47:34,223 INFO L78 Accepts]: Start accepts. Automaton has 2409 states and 6526 transitions. Word has length 110 [2021-05-21 15:47:34,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:34,223 INFO L482 AbstractCegarLoop]: Abstraction has 2409 states and 6526 transitions. [2021-05-21 15:47:34,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.6) internal successors, (140), 25 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:34,223 INFO L276 IsEmpty]: Start isEmpty. Operand 2409 states and 6526 transitions. [2021-05-21 15:47:34,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:34,224 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:34,225 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:34,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:34,426 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:34,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:34,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1067386545, now seen corresponding path program 116 times [2021-05-21 15:47:34,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:34,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209792846] [2021-05-21 15:47:34,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:34,585 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:34,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:34,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209792846] [2021-05-21 15:47:34,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209792846] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:34,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390566844] [2021-05-21 15:47:34,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:34,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:47:34,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:34,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:47:34,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:34,788 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:34,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390566844] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:34,789 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:34,789 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-05-21 15:47:34,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047172105] [2021-05-21 15:47:34,789 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:47:34,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:34,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:47:34,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:47:34,789 INFO L87 Difference]: Start difference. First operand 2409 states and 6526 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:35,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:35,082 INFO L93 Difference]: Finished difference Result 4086 states and 10137 transitions. [2021-05-21 15:47:35,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-21 15:47:35,082 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:35,085 INFO L225 Difference]: With dead ends: 4086 [2021-05-21 15:47:35,086 INFO L226 Difference]: Without dead ends: 3816 [2021-05-21 15:47:35,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 329.0ms TimeCoverageRelationStatistics Valid=446, Invalid=1194, Unknown=0, NotChecked=0, Total=1640 [2021-05-21 15:47:35,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-05-21 15:47:35,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 2553. [2021-05-21 15:47:35,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2552 states have (on average 2.720611285266458) internal successors, (6943), 2552 states have internal predecessors, (6943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 6943 transitions. [2021-05-21 15:47:35,113 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 6943 transitions. Word has length 110 [2021-05-21 15:47:35,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:35,113 INFO L482 AbstractCegarLoop]: Abstraction has 2553 states and 6943 transitions. [2021-05-21 15:47:35,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:35,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 6943 transitions. [2021-05-21 15:47:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:35,115 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:35,115 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:35,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:35,316 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:35,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:35,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1447830497, now seen corresponding path program 117 times [2021-05-21 15:47:35,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:35,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391286781] [2021-05-21 15:47:35,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:35,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:35,495 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:35,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:35,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391286781] [2021-05-21 15:47:35,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391286781] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:35,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028946853] [2021-05-21 15:47:35,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:35,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 15:47:35,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:35,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:47:35,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:35,706 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:35,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028946853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:35,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:35,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 15:47:35,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166077618] [2021-05-21 15:47:35,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:47:35,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:35,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:47:35,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:47:35,708 INFO L87 Difference]: Start difference. First operand 2553 states and 6943 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:36,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:36,054 INFO L93 Difference]: Finished difference Result 4046 states and 10132 transitions. [2021-05-21 15:47:36,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:47:36,054 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:36,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:36,058 INFO L225 Difference]: With dead ends: 4046 [2021-05-21 15:47:36,058 INFO L226 Difference]: Without dead ends: 3776 [2021-05-21 15:47:36,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 413.9ms TimeCoverageRelationStatistics Valid=507, Invalid=1473, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 15:47:36,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-05-21 15:47:36,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 2628. [2021-05-21 15:47:36,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2628 states, 2627 states have (on average 2.7285877426722496) internal successors, (7168), 2627 states have internal predecessors, (7168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:36,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2628 states to 2628 states and 7168 transitions. [2021-05-21 15:47:36,088 INFO L78 Accepts]: Start accepts. Automaton has 2628 states and 7168 transitions. Word has length 110 [2021-05-21 15:47:36,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:36,088 INFO L482 AbstractCegarLoop]: Abstraction has 2628 states and 7168 transitions. [2021-05-21 15:47:36,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:36,089 INFO L276 IsEmpty]: Start isEmpty. Operand 2628 states and 7168 transitions. [2021-05-21 15:47:36,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:36,090 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:36,090 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:36,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-05-21 15:47:36,301 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:36,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:36,301 INFO L82 PathProgramCache]: Analyzing trace with hash -823455347, now seen corresponding path program 118 times [2021-05-21 15:47:36,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:36,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367039433] [2021-05-21 15:47:36,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:36,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:36,455 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:36,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367039433] [2021-05-21 15:47:36,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367039433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:36,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367934568] [2021-05-21 15:47:36,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:36,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:47:36,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:36,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:47:36,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:36,656 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:36,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367934568] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:36,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:36,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-05-21 15:47:36,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213392716] [2021-05-21 15:47:36,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:47:36,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:36,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:47:36,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:47:36,657 INFO L87 Difference]: Start difference. First operand 2628 states and 7168 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:36,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:36,984 INFO L93 Difference]: Finished difference Result 4096 states and 10307 transitions. [2021-05-21 15:47:36,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-21 15:47:36,985 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:36,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:36,988 INFO L225 Difference]: With dead ends: 4096 [2021-05-21 15:47:36,989 INFO L226 Difference]: Without dead ends: 3826 [2021-05-21 15:47:36,989 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 360.4ms TimeCoverageRelationStatistics Valid=454, Invalid=1352, Unknown=0, NotChecked=0, Total=1806 [2021-05-21 15:47:36,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3826 states. [2021-05-21 15:47:37,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3826 to 2703. [2021-05-21 15:47:37,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2703 states, 2702 states have (on average 2.736121391561806) internal successors, (7393), 2702 states have internal predecessors, (7393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2703 states to 2703 states and 7393 transitions. [2021-05-21 15:47:37,019 INFO L78 Accepts]: Start accepts. Automaton has 2703 states and 7393 transitions. Word has length 110 [2021-05-21 15:47:37,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:37,019 INFO L482 AbstractCegarLoop]: Abstraction has 2703 states and 7393 transitions. [2021-05-21 15:47:37,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:37,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2703 states and 7393 transitions. [2021-05-21 15:47:37,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:37,021 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:37,021 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:37,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:37,233 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:37,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:37,233 INFO L82 PathProgramCache]: Analyzing trace with hash -14403491, now seen corresponding path program 119 times [2021-05-21 15:47:37,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:37,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337303837] [2021-05-21 15:47:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:37,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:37,395 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:37,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:37,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337303837] [2021-05-21 15:47:37,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337303837] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:37,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123933020] [2021-05-21 15:47:37,396 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:37,451 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 15:47:37,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:37,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:47:37,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:37,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123933020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:37,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:37,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 15:47:37,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556922502] [2021-05-21 15:47:37,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:47:37,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:37,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:47:37,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:47:37,599 INFO L87 Difference]: Start difference. First operand 2703 states and 7393 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:38,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:38,081 INFO L93 Difference]: Finished difference Result 4121 states and 10432 transitions. [2021-05-21 15:47:38,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:47:38,082 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:38,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:38,086 INFO L225 Difference]: With dead ends: 4121 [2021-05-21 15:47:38,086 INFO L226 Difference]: Without dead ends: 3851 [2021-05-21 15:47:38,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 483.6ms TimeCoverageRelationStatistics Valid=523, Invalid=1639, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:47:38,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3851 states. [2021-05-21 15:47:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3851 to 2778. [2021-05-21 15:47:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2778 states, 2777 states have (on average 2.7432481094706516) internal successors, (7618), 2777 states have internal predecessors, (7618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:38,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2778 states to 2778 states and 7618 transitions. [2021-05-21 15:47:38,118 INFO L78 Accepts]: Start accepts. Automaton has 2778 states and 7618 transitions. Word has length 110 [2021-05-21 15:47:38,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:38,119 INFO L482 AbstractCegarLoop]: Abstraction has 2778 states and 7618 transitions. [2021-05-21 15:47:38,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:38,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2778 states and 7618 transitions. [2021-05-21 15:47:38,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:38,121 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:38,121 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:38,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:38,341 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:38,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:38,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1406353589, now seen corresponding path program 120 times [2021-05-21 15:47:38,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:38,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326686801] [2021-05-21 15:47:38,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:38,521 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:38,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:38,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326686801] [2021-05-21 15:47:38,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326686801] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:38,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982029255] [2021-05-21 15:47:38,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:38,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 15:47:38,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:38,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:47:38,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:38,728 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:38,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982029255] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:38,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:38,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-05-21 15:47:38,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353245318] [2021-05-21 15:47:38,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:47:38,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:38,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:47:38,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:47:38,729 INFO L87 Difference]: Start difference. First operand 2778 states and 7618 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:39,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:39,076 INFO L93 Difference]: Finished difference Result 4146 states and 10557 transitions. [2021-05-21 15:47:39,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:47:39,080 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:39,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:39,083 INFO L225 Difference]: With dead ends: 4146 [2021-05-21 15:47:39,084 INFO L226 Difference]: Without dead ends: 3876 [2021-05-21 15:47:39,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 368.9ms TimeCoverageRelationStatistics Valid=478, Invalid=1502, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 15:47:39,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3876 states. [2021-05-21 15:47:39,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3876 to 2853. [2021-05-21 15:47:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2853 states, 2852 states have (on average 2.75) internal successors, (7843), 2852 states have internal predecessors, (7843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:39,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2853 states to 2853 states and 7843 transitions. [2021-05-21 15:47:39,113 INFO L78 Accepts]: Start accepts. Automaton has 2853 states and 7843 transitions. Word has length 110 [2021-05-21 15:47:39,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:39,113 INFO L482 AbstractCegarLoop]: Abstraction has 2853 states and 7843 transitions. [2021-05-21 15:47:39,113 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2853 states and 7843 transitions. [2021-05-21 15:47:39,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:39,115 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:39,115 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:39,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:39,317 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:39,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:39,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1651430885, now seen corresponding path program 121 times [2021-05-21 15:47:39,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:39,317 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074108169] [2021-05-21 15:47:39,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:39,468 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:39,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:39,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074108169] [2021-05-21 15:47:39,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074108169] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:39,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75594058] [2021-05-21 15:47:39,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:39,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:47:39,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:39,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75594058] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:39,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:39,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 15:47:39,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690764764] [2021-05-21 15:47:39,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:47:39,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:39,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:47:39,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:47:39,673 INFO L87 Difference]: Start difference. First operand 2853 states and 7843 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:40,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:40,120 INFO L93 Difference]: Finished difference Result 4171 states and 10682 transitions. [2021-05-21 15:47:40,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:47:40,120 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:40,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:40,124 INFO L225 Difference]: With dead ends: 4171 [2021-05-21 15:47:40,124 INFO L226 Difference]: Without dead ends: 3901 [2021-05-21 15:47:40,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 460.7ms TimeCoverageRelationStatistics Valid=555, Invalid=1797, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 15:47:40,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3901 states. [2021-05-21 15:47:40,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3901 to 2928. [2021-05-21 15:47:40,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2928 states, 2927 states have (on average 2.756405876323881) internal successors, (8068), 2927 states have internal predecessors, (8068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:40,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2928 states to 2928 states and 8068 transitions. [2021-05-21 15:47:40,156 INFO L78 Accepts]: Start accepts. Automaton has 2928 states and 8068 transitions. Word has length 110 [2021-05-21 15:47:40,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:40,156 INFO L482 AbstractCegarLoop]: Abstraction has 2928 states and 8068 transitions. [2021-05-21 15:47:40,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:40,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2928 states and 8068 transitions. [2021-05-21 15:47:40,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:40,158 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:40,158 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:40,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-05-21 15:47:40,361 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:40,361 INFO L82 PathProgramCache]: Analyzing trace with hash -2028281207, now seen corresponding path program 122 times [2021-05-21 15:47:40,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:40,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344457192] [2021-05-21 15:47:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:40,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:40,499 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:40,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:40,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344457192] [2021-05-21 15:47:40,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344457192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:40,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242489848] [2021-05-21 15:47:40,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:40,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:47:40,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:40,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:47:40,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:40,697 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:40,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242489848] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:40,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:40,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-05-21 15:47:40,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964347147] [2021-05-21 15:47:40,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:47:40,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:40,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:47:40,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:47:40,698 INFO L87 Difference]: Start difference. First operand 2928 states and 8068 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:41,071 INFO L93 Difference]: Finished difference Result 4196 states and 10807 transitions. [2021-05-21 15:47:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:47:41,071 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:41,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:41,074 INFO L225 Difference]: With dead ends: 4196 [2021-05-21 15:47:41,075 INFO L226 Difference]: Without dead ends: 3926 [2021-05-21 15:47:41,075 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 383.3ms TimeCoverageRelationStatistics Valid=518, Invalid=1644, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:47:41,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-05-21 15:47:41,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3003. [2021-05-21 15:47:41,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 2.762491672218521) internal successors, (8293), 3002 states have internal predecessors, (8293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:41,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 8293 transitions. [2021-05-21 15:47:41,105 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 8293 transitions. Word has length 110 [2021-05-21 15:47:41,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:41,105 INFO L482 AbstractCegarLoop]: Abstraction has 3003 states and 8293 transitions. [2021-05-21 15:47:41,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:41,105 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 8293 transitions. [2021-05-21 15:47:41,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:41,107 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:41,107 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:41,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-05-21 15:47:41,308 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:41,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:41,308 INFO L82 PathProgramCache]: Analyzing trace with hash -701525671, now seen corresponding path program 123 times [2021-05-21 15:47:41,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:41,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826076070] [2021-05-21 15:47:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:41,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:41,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:41,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826076070] [2021-05-21 15:47:41,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826076070] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:41,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560030877] [2021-05-21 15:47:41,452 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:41,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 15:47:41,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:41,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:47:41,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:41,649 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:41,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560030877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:41,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:41,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 15:47:41,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762842477] [2021-05-21 15:47:41,650 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:47:41,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:41,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:47:41,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:47:41,650 INFO L87 Difference]: Start difference. First operand 3003 states and 8293 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:42,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:42,109 INFO L93 Difference]: Finished difference Result 4221 states and 10932 transitions. [2021-05-21 15:47:42,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:47:42,109 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:42,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:42,113 INFO L225 Difference]: With dead ends: 4221 [2021-05-21 15:47:42,113 INFO L226 Difference]: Without dead ends: 3951 [2021-05-21 15:47:42,113 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 460.0ms TimeCoverageRelationStatistics Valid=528, Invalid=1824, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 15:47:42,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3951 states. [2021-05-21 15:47:42,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3951 to 3078. [2021-05-21 15:47:42,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3078 states, 3077 states have (on average 2.7682807929801756) internal successors, (8518), 3077 states have internal predecessors, (8518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:42,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3078 states to 3078 states and 8518 transitions. [2021-05-21 15:47:42,147 INFO L78 Accepts]: Start accepts. Automaton has 3078 states and 8518 transitions. Word has length 110 [2021-05-21 15:47:42,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:42,147 INFO L482 AbstractCegarLoop]: Abstraction has 3078 states and 8518 transitions. [2021-05-21 15:47:42,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:42,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3078 states and 8518 transitions. [2021-05-21 15:47:42,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:42,149 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:42,149 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:42,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-05-21 15:47:42,350 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:42,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:42,350 INFO L82 PathProgramCache]: Analyzing trace with hash -247309497, now seen corresponding path program 124 times [2021-05-21 15:47:42,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:42,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704468276] [2021-05-21 15:47:42,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:42,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:42,497 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:42,497 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:42,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704468276] [2021-05-21 15:47:42,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704468276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:42,497 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823139670] [2021-05-21 15:47:42,497 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:42,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:47:42,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:42,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:47:42,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:42,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823139670] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:42,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:42,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-05-21 15:47:42,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974802812] [2021-05-21 15:47:42,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:47:42,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:42,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:47:42,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:47:42,684 INFO L87 Difference]: Start difference. First operand 3078 states and 8518 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:43,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:43,110 INFO L93 Difference]: Finished difference Result 4246 states and 11057 transitions. [2021-05-21 15:47:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:47:43,111 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:43,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:43,115 INFO L225 Difference]: With dead ends: 4246 [2021-05-21 15:47:43,115 INFO L226 Difference]: Without dead ends: 3976 [2021-05-21 15:47:43,115 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 423.3ms TimeCoverageRelationStatistics Valid=574, Invalid=1778, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 15:47:43,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3976 states. [2021-05-21 15:47:43,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3976 to 3153. [2021-05-21 15:47:43,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3153 states, 3152 states have (on average 2.7737944162436547) internal successors, (8743), 3152 states have internal predecessors, (8743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:43,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3153 states to 3153 states and 8743 transitions. [2021-05-21 15:47:43,155 INFO L78 Accepts]: Start accepts. Automaton has 3153 states and 8743 transitions. Word has length 110 [2021-05-21 15:47:43,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:43,155 INFO L482 AbstractCegarLoop]: Abstraction has 3153 states and 8743 transitions. [2021-05-21 15:47:43,155 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:43,155 INFO L276 IsEmpty]: Start isEmpty. Operand 3153 states and 8743 transitions. [2021-05-21 15:47:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:43,157 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:43,157 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:43,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-05-21 15:47:43,373 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:43,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:43,374 INFO L82 PathProgramCache]: Analyzing trace with hash 751586839, now seen corresponding path program 125 times [2021-05-21 15:47:43,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:43,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691111904] [2021-05-21 15:47:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:43,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:43,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691111904] [2021-05-21 15:47:43,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691111904] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:43,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883413462] [2021-05-21 15:47:43,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:43,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 15:47:43,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:43,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:47:43,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:43,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883413462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:43,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:43,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 15:47:43,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525600999] [2021-05-21 15:47:43,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:47:43,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:43,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:47:43,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:47:43,731 INFO L87 Difference]: Start difference. First operand 3153 states and 8743 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:44,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:44,278 INFO L93 Difference]: Finished difference Result 4271 states and 11182 transitions. [2021-05-21 15:47:44,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:47:44,279 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:44,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:44,283 INFO L225 Difference]: With dead ends: 4271 [2021-05-21 15:47:44,283 INFO L226 Difference]: Without dead ends: 4001 [2021-05-21 15:47:44,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 534.8ms TimeCoverageRelationStatistics Valid=667, Invalid=2089, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 15:47:44,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-05-21 15:47:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 3228. [2021-05-21 15:47:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3228 states, 3227 states have (on average 2.779051750852185) internal successors, (8968), 3227 states have internal predecessors, (8968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:44,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3228 states to 3228 states and 8968 transitions. [2021-05-21 15:47:44,330 INFO L78 Accepts]: Start accepts. Automaton has 3228 states and 8968 transitions. Word has length 110 [2021-05-21 15:47:44,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:44,330 INFO L482 AbstractCegarLoop]: Abstraction has 3228 states and 8968 transitions. [2021-05-21 15:47:44,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:44,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3228 states and 8968 transitions. [2021-05-21 15:47:44,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:44,332 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:44,332 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:44,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-05-21 15:47:44,533 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:44,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:44,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1127741051, now seen corresponding path program 126 times [2021-05-21 15:47:44,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:44,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698822598] [2021-05-21 15:47:44,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:44,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:44,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698822598] [2021-05-21 15:47:44,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698822598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:44,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558172721] [2021-05-21 15:47:44,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:44,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 15:47:44,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:44,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-21 15:47:44,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:44,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558172721] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:44,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:44,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-05-21 15:47:44,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197208328] [2021-05-21 15:47:44,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:47:44,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:44,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:47:44,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:47:44,842 INFO L87 Difference]: Start difference. First operand 3228 states and 8968 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:45,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:45,290 INFO L93 Difference]: Finished difference Result 4296 states and 11307 transitions. [2021-05-21 15:47:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:47:45,291 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:45,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:45,295 INFO L225 Difference]: With dead ends: 4296 [2021-05-21 15:47:45,295 INFO L226 Difference]: Without dead ends: 4026 [2021-05-21 15:47:45,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 428.3ms TimeCoverageRelationStatistics Valid=646, Invalid=1904, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 15:47:45,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-05-21 15:47:45,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 3303. [2021-05-21 15:47:45,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 3302 states have (on average 2.784070260448213) internal successors, (9193), 3302 states have internal predecessors, (9193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:45,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 9193 transitions. [2021-05-21 15:47:45,333 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 9193 transitions. Word has length 110 [2021-05-21 15:47:45,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:45,334 INFO L482 AbstractCegarLoop]: Abstraction has 3303 states and 9193 transitions. [2021-05-21 15:47:45,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:45,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 9193 transitions. [2021-05-21 15:47:45,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:45,336 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:45,336 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:45,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:45,536 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:45,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:45,537 INFO L82 PathProgramCache]: Analyzing trace with hash 902578261, now seen corresponding path program 127 times [2021-05-21 15:47:45,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:45,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787747464] [2021-05-21 15:47:45,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:45,672 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:45,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:45,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787747464] [2021-05-21 15:47:45,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787747464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:45,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965443161] [2021-05-21 15:47:45,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:45,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:47:45,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:45,863 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:45,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965443161] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:45,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:45,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 15:47:45,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230924047] [2021-05-21 15:47:45,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:47:45,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:45,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:47:45,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:47:45,864 INFO L87 Difference]: Start difference. First operand 3303 states and 9193 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:46,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:46,502 INFO L93 Difference]: Finished difference Result 4321 states and 11432 transitions. [2021-05-21 15:47:46,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:47:46,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:46,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:46,506 INFO L225 Difference]: With dead ends: 4321 [2021-05-21 15:47:46,506 INFO L226 Difference]: Without dead ends: 4051 [2021-05-21 15:47:46,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 590.2ms TimeCoverageRelationStatistics Valid=747, Invalid=2223, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 15:47:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-05-21 15:47:46,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3378. [2021-05-21 15:47:46,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3378 states, 3377 states have (on average 2.788865857269766) internal successors, (9418), 3377 states have internal predecessors, (9418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:46,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3378 states to 3378 states and 9418 transitions. [2021-05-21 15:47:46,540 INFO L78 Accepts]: Start accepts. Automaton has 3378 states and 9418 transitions. Word has length 110 [2021-05-21 15:47:46,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:46,540 INFO L482 AbstractCegarLoop]: Abstraction has 3378 states and 9418 transitions. [2021-05-21 15:47:46,540 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:46,540 INFO L276 IsEmpty]: Start isEmpty. Operand 3378 states and 9418 transitions. [2021-05-21 15:47:46,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:46,542 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:46,542 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:46,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-05-21 15:47:46,745 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:46,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:46,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1516817731, now seen corresponding path program 128 times [2021-05-21 15:47:46,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:46,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729688457] [2021-05-21 15:47:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:46,873 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:46,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:46,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729688457] [2021-05-21 15:47:46,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729688457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:46,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929402957] [2021-05-21 15:47:46,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:46,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:47:46,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:46,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:47:46,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:47,052 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:47,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1929402957] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:47,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:47,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-05-21 15:47:47,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693056433] [2021-05-21 15:47:47,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:47:47,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:47,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:47:47,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:47:47,053 INFO L87 Difference]: Start difference. First operand 3378 states and 9418 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:47,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:47,530 INFO L93 Difference]: Finished difference Result 4391 states and 11677 transitions. [2021-05-21 15:47:47,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:47:47,530 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:47,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:47,534 INFO L225 Difference]: With dead ends: 4391 [2021-05-21 15:47:47,534 INFO L226 Difference]: Without dead ends: 4121 [2021-05-21 15:47:47,534 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 459.4ms TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 15:47:47,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-05-21 15:47:47,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3453. [2021-05-21 15:47:47,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3453 states, 3452 states have (on average 2.7977983777520277) internal successors, (9658), 3452 states have internal predecessors, (9658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:47,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3453 states to 3453 states and 9658 transitions. [2021-05-21 15:47:47,571 INFO L78 Accepts]: Start accepts. Automaton has 3453 states and 9658 transitions. Word has length 110 [2021-05-21 15:47:47,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:47,571 INFO L482 AbstractCegarLoop]: Abstraction has 3453 states and 9658 transitions. [2021-05-21 15:47:47,571 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:47,571 INFO L276 IsEmpty]: Start isEmpty. Operand 3453 states and 9658 transitions. [2021-05-21 15:47:47,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:47,573 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:47,573 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:47,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:47,774 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:47,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:47,774 INFO L82 PathProgramCache]: Analyzing trace with hash -198424557, now seen corresponding path program 129 times [2021-05-21 15:47:47,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:47,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493280188] [2021-05-21 15:47:47,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:47,906 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:47,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:47,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493280188] [2021-05-21 15:47:47,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493280188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:47,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268224910] [2021-05-21 15:47:47,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:47,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 15:47:47,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:47,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:47:47,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:48,099 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:48,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268224910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:48,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:48,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 15:47:48,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642017109] [2021-05-21 15:47:48,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:47:48,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:48,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:47:48,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:47:48,100 INFO L87 Difference]: Start difference. First operand 3453 states and 9658 transitions. Second operand has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:48,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:48,754 INFO L93 Difference]: Finished difference Result 4969 states and 13303 transitions. [2021-05-21 15:47:48,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:47:48,755 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:48,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:48,759 INFO L225 Difference]: With dead ends: 4969 [2021-05-21 15:47:48,759 INFO L226 Difference]: Without dead ends: 4346 [2021-05-21 15:47:48,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 590.6ms TimeCoverageRelationStatistics Valid=737, Invalid=2455, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 15:47:48,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4346 states. [2021-05-21 15:47:48,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4346 to 3528. [2021-05-21 15:47:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 2.8035157357527645) internal successors, (9888), 3527 states have internal predecessors, (9888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:48,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 9888 transitions. [2021-05-21 15:47:48,797 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 9888 transitions. Word has length 110 [2021-05-21 15:47:48,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:48,797 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 9888 transitions. [2021-05-21 15:47:48,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.956521739130435) internal successors, (114), 23 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:48,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 9888 transitions. [2021-05-21 15:47:48,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:48,800 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:48,800 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:49,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:49,000 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:49,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:49,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1231072159, now seen corresponding path program 130 times [2021-05-21 15:47:49,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:49,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56299404] [2021-05-21 15:47:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:49,140 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:49,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:49,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56299404] [2021-05-21 15:47:49,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56299404] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:49,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5913539] [2021-05-21 15:47:49,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:49,193 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:47:49,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:49,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:47:49,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:49,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5913539] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:49,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:49,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-05-21 15:47:49,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413183503] [2021-05-21 15:47:49,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-21 15:47:49,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:49,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-21 15:47:49,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-05-21 15:47:49,314 INFO L87 Difference]: Start difference. First operand 3528 states and 9888 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:49,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:49,834 INFO L93 Difference]: Finished difference Result 5198 states and 14021 transitions. [2021-05-21 15:47:49,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:47:49,834 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:49,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:49,839 INFO L225 Difference]: With dead ends: 5198 [2021-05-21 15:47:49,839 INFO L226 Difference]: Without dead ends: 4928 [2021-05-21 15:47:49,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 481.1ms TimeCoverageRelationStatistics Valid=839, Invalid=2131, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 15:47:49,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4928 states. [2021-05-21 15:47:49,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4928 to 3708. [2021-05-21 15:47:49,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3708 states, 3707 states have (on average 2.8181818181818183) internal successors, (10447), 3707 states have internal predecessors, (10447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:49,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3708 states to 3708 states and 10447 transitions. [2021-05-21 15:47:49,877 INFO L78 Accepts]: Start accepts. Automaton has 3708 states and 10447 transitions. Word has length 110 [2021-05-21 15:47:49,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:49,877 INFO L482 AbstractCegarLoop]: Abstraction has 3708 states and 10447 transitions. [2021-05-21 15:47:49,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 22 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:49,877 INFO L276 IsEmpty]: Start isEmpty. Operand 3708 states and 10447 transitions. [2021-05-21 15:47:49,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-21 15:47:49,880 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:49,880 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:50,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:50,080 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:50,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:50,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1208728909, now seen corresponding path program 131 times [2021-05-21 15:47:50,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:50,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27410540] [2021-05-21 15:47:50,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:50,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:50,225 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:50,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:50,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27410540] [2021-05-21 15:47:50,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27410540] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:50,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086072723] [2021-05-21 15:47:50,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:50,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 15:47:50,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:50,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-21 15:47:50,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:50,410 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 238 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:50,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086072723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:50,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:50,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-05-21 15:47:50,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724967141] [2021-05-21 15:47:50,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:47:50,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:50,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:47:50,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:47:50,411 INFO L87 Difference]: Start difference. First operand 3708 states and 10447 transitions. Second operand has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:51,137 INFO L93 Difference]: Finished difference Result 5021 states and 13521 transitions. [2021-05-21 15:47:51,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:47:51,137 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 110 [2021-05-21 15:47:51,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:51,142 INFO L225 Difference]: With dead ends: 5021 [2021-05-21 15:47:51,142 INFO L226 Difference]: Without dead ends: 4446 [2021-05-21 15:47:51,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 678.8ms TimeCoverageRelationStatistics Valid=997, Invalid=2785, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 15:47:51,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4446 states. [2021-05-21 15:47:51,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4446 to 2603. [2021-05-21 15:47:51,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2603 states, 2602 states have (on average 2.735588009223674) internal successors, (7118), 2602 states have internal predecessors, (7118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:51,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 7118 transitions. [2021-05-21 15:47:51,172 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 7118 transitions. Word has length 110 [2021-05-21 15:47:51,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:51,172 INFO L482 AbstractCegarLoop]: Abstraction has 2603 states and 7118 transitions. [2021-05-21 15:47:51,172 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.913043478260869) internal successors, (113), 23 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:51,172 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 7118 transitions. [2021-05-21 15:47:51,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:47:51,174 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:51,174 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:51,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:51,374 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:51,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:51,374 INFO L82 PathProgramCache]: Analyzing trace with hash -207372468, now seen corresponding path program 132 times [2021-05-21 15:47:51,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:51,374 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421054608] [2021-05-21 15:47:51,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:51,530 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:51,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:51,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421054608] [2021-05-21 15:47:51,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421054608] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:51,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615456342] [2021-05-21 15:47:51,530 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:51,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 15:47:51,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:51,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:47:51,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:51,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615456342] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:51,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:51,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-05-21 15:47:51,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053251196] [2021-05-21 15:47:51,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:47:51,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:51,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:47:51,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:47:51,732 INFO L87 Difference]: Start difference. First operand 2603 states and 7118 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:52,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:52,057 INFO L93 Difference]: Finished difference Result 3821 states and 9757 transitions. [2021-05-21 15:47:52,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-21 15:47:52,057 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:47:52,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:52,060 INFO L225 Difference]: With dead ends: 3821 [2021-05-21 15:47:52,060 INFO L226 Difference]: Without dead ends: 3551 [2021-05-21 15:47:52,061 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 359.9ms TimeCoverageRelationStatistics Valid=508, Invalid=1472, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 15:47:52,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-05-21 15:47:52,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 2678. [2021-05-21 15:47:52,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2678 states, 2677 states have (on average 2.742995890922675) internal successors, (7343), 2677 states have internal predecessors, (7343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:52,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2678 states to 2678 states and 7343 transitions. [2021-05-21 15:47:52,085 INFO L78 Accepts]: Start accepts. Automaton has 2678 states and 7343 transitions. Word has length 115 [2021-05-21 15:47:52,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:52,085 INFO L482 AbstractCegarLoop]: Abstraction has 2678 states and 7343 transitions. [2021-05-21 15:47:52,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:52,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2678 states and 7343 transitions. [2021-05-21 15:47:52,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:47:52,087 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:52,087 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:52,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-05-21 15:47:52,287 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:52,287 INFO L82 PathProgramCache]: Analyzing trace with hash -587816420, now seen corresponding path program 133 times [2021-05-21 15:47:52,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:52,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883524893] [2021-05-21 15:47:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:52,462 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:52,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:52,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883524893] [2021-05-21 15:47:52,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883524893] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:52,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771477604] [2021-05-21 15:47:52,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:52,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:47:52,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:52,667 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:52,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771477604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:52,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:52,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-05-21 15:47:52,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864473653] [2021-05-21 15:47:52,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:47:52,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:52,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:47:52,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:47:52,668 INFO L87 Difference]: Start difference. First operand 2678 states and 7343 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:53,047 INFO L93 Difference]: Finished difference Result 4241 states and 10672 transitions. [2021-05-21 15:47:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:47:53,048 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:47:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:53,051 INFO L225 Difference]: With dead ends: 4241 [2021-05-21 15:47:53,052 INFO L226 Difference]: Without dead ends: 3971 [2021-05-21 15:47:53,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 431.9ms TimeCoverageRelationStatistics Valid=560, Invalid=1696, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 15:47:53,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-05-21 15:47:53,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 2753. [2021-05-21 15:47:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.75) internal successors, (7568), 2752 states have internal predecessors, (7568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:53,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7568 transitions. [2021-05-21 15:47:53,083 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7568 transitions. Word has length 115 [2021-05-21 15:47:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:53,084 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7568 transitions. [2021-05-21 15:47:53,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:53,084 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7568 transitions. [2021-05-21 15:47:53,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:47:53,086 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:53,086 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:53,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-05-21 15:47:53,286 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:53,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:53,286 INFO L82 PathProgramCache]: Analyzing trace with hash 36558730, now seen corresponding path program 134 times [2021-05-21 15:47:53,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:53,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556148320] [2021-05-21 15:47:53,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:53,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:53,449 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:53,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:53,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556148320] [2021-05-21 15:47:53,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556148320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:53,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950675409] [2021-05-21 15:47:53,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:53,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:47:53,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:53,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:47:53,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:53,641 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:53,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950675409] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:53,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:53,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-05-21 15:47:53,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326513087] [2021-05-21 15:47:53,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:47:53,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:53,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:47:53,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:47:53,642 INFO L87 Difference]: Start difference. First operand 2753 states and 7568 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:54,010 INFO L93 Difference]: Finished difference Result 4271 states and 10807 transitions. [2021-05-21 15:47:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:47:54,010 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:47:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:54,014 INFO L225 Difference]: With dead ends: 4271 [2021-05-21 15:47:54,014 INFO L226 Difference]: Without dead ends: 4001 [2021-05-21 15:47:54,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 398.7ms TimeCoverageRelationStatistics Valid=560, Invalid=1696, Unknown=0, NotChecked=0, Total=2256 [2021-05-21 15:47:54,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2021-05-21 15:47:54,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 2828. [2021-05-21 15:47:54,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.75663247258578) internal successors, (7793), 2827 states have internal predecessors, (7793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:54,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7793 transitions. [2021-05-21 15:47:54,045 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7793 transitions. Word has length 115 [2021-05-21 15:47:54,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:54,045 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7793 transitions. [2021-05-21 15:47:54,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:54,045 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7793 transitions. [2021-05-21 15:47:54,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:47:54,047 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:54,047 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:54,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2021-05-21 15:47:54,247 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:54,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:54,248 INFO L82 PathProgramCache]: Analyzing trace with hash 845610586, now seen corresponding path program 135 times [2021-05-21 15:47:54,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:54,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657669814] [2021-05-21 15:47:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:54,414 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:54,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:54,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657669814] [2021-05-21 15:47:54,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657669814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:54,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525295921] [2021-05-21 15:47:54,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:54,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 15:47:54,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:54,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-21 15:47:54,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:54,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525295921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:54,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:54,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-05-21 15:47:54,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389865442] [2021-05-21 15:47:54,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:47:54,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:54,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:47:54,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:47:54,620 INFO L87 Difference]: Start difference. First operand 2828 states and 7793 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:55,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:55,054 INFO L93 Difference]: Finished difference Result 4296 states and 10932 transitions. [2021-05-21 15:47:55,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:47:55,054 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:47:55,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:55,058 INFO L225 Difference]: With dead ends: 4296 [2021-05-21 15:47:55,059 INFO L226 Difference]: Without dead ends: 4026 [2021-05-21 15:47:55,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 467.1ms TimeCoverageRelationStatistics Valid=577, Invalid=1873, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 15:47:55,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4026 states. [2021-05-21 15:47:55,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4026 to 2903. [2021-05-21 15:47:55,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 2.7629221226740177) internal successors, (8018), 2902 states have internal predecessors, (8018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:55,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 8018 transitions. [2021-05-21 15:47:55,093 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 8018 transitions. Word has length 115 [2021-05-21 15:47:55,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:55,093 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 8018 transitions. [2021-05-21 15:47:55,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:55,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 8018 transitions. [2021-05-21 15:47:55,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:47:55,095 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:55,095 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:55,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-05-21 15:47:55,296 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:55,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:55,296 INFO L82 PathProgramCache]: Analyzing trace with hash -546339512, now seen corresponding path program 136 times [2021-05-21 15:47:55,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:55,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901836433] [2021-05-21 15:47:55,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:55,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:55,457 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:55,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:55,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901836433] [2021-05-21 15:47:55,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901836433] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:55,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719040516] [2021-05-21 15:47:55,457 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:55,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:47:55,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:55,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:47:55,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:55,680 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:55,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719040516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:55,680 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:55,680 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-05-21 15:47:55,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240249131] [2021-05-21 15:47:55,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:47:55,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:55,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:47:55,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:47:55,681 INFO L87 Difference]: Start difference. First operand 2903 states and 8018 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:56,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:56,079 INFO L93 Difference]: Finished difference Result 4321 states and 11057 transitions. [2021-05-21 15:47:56,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:47:56,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:47:56,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:56,083 INFO L225 Difference]: With dead ends: 4321 [2021-05-21 15:47:56,083 INFO L226 Difference]: Without dead ends: 4051 [2021-05-21 15:47:56,083 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 426.2ms TimeCoverageRelationStatistics Valid=597, Invalid=1853, Unknown=0, NotChecked=0, Total=2450 [2021-05-21 15:47:56,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-05-21 15:47:56,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 2978. [2021-05-21 15:47:56,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.7688948605979173) internal successors, (8243), 2977 states have internal predecessors, (8243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:56,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8243 transitions. [2021-05-21 15:47:56,116 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8243 transitions. Word has length 115 [2021-05-21 15:47:56,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:56,117 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8243 transitions. [2021-05-21 15:47:56,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:56,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8243 transitions. [2021-05-21 15:47:56,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:47:56,119 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:56,119 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:56,319 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:56,319 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:56,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:56,319 INFO L82 PathProgramCache]: Analyzing trace with hash -791416808, now seen corresponding path program 137 times [2021-05-21 15:47:56,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:56,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243617221] [2021-05-21 15:47:56,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:56,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:56,479 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:56,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:56,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243617221] [2021-05-21 15:47:56,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243617221] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:56,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497278235] [2021-05-21 15:47:56,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:56,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 15:47:56,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:56,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:47:56,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:56,681 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:56,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497278235] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:56,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:56,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-05-21 15:47:56,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628663012] [2021-05-21 15:47:56,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:47:56,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:56,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:47:56,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:47:56,682 INFO L87 Difference]: Start difference. First operand 2978 states and 8243 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:57,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:57,157 INFO L93 Difference]: Finished difference Result 4346 states and 11182 transitions. [2021-05-21 15:47:57,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:47:57,157 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:47:57,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:57,161 INFO L225 Difference]: With dead ends: 4346 [2021-05-21 15:47:57,161 INFO L226 Difference]: Without dead ends: 4076 [2021-05-21 15:47:57,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 494.1ms TimeCoverageRelationStatistics Valid=622, Invalid=2030, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 15:47:57,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4076 states. [2021-05-21 15:47:57,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4076 to 3053. [2021-05-21 15:47:57,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 2.7745740498034075) internal successors, (8468), 3052 states have internal predecessors, (8468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:57,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8468 transitions. [2021-05-21 15:47:57,196 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8468 transitions. Word has length 115 [2021-05-21 15:47:57,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:57,196 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8468 transitions. [2021-05-21 15:47:57,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:57,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8468 transitions. [2021-05-21 15:47:57,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:47:57,198 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:57,198 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:57,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-05-21 15:47:57,398 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:57,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:57,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1168267130, now seen corresponding path program 138 times [2021-05-21 15:47:57,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:57,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999027127] [2021-05-21 15:47:57,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:57,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:57,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999027127] [2021-05-21 15:47:57,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999027127] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:57,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156964684] [2021-05-21 15:47:57,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:57,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 15:47:57,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:57,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:47:57,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:57,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156964684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:57,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:57,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-05-21 15:47:57,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496409230] [2021-05-21 15:47:57,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:47:57,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:57,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:47:57,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:47:57,758 INFO L87 Difference]: Start difference. First operand 3053 states and 8468 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:58,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:58,184 INFO L93 Difference]: Finished difference Result 4371 states and 11307 transitions. [2021-05-21 15:47:58,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:47:58,184 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:47:58,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:58,188 INFO L225 Difference]: With dead ends: 4371 [2021-05-21 15:47:58,189 INFO L226 Difference]: Without dead ends: 4101 [2021-05-21 15:47:58,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 435.1ms TimeCoverageRelationStatistics Valid=650, Invalid=2002, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 15:47:58,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4101 states. [2021-05-21 15:47:58,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4101 to 3128. [2021-05-21 15:47:58,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.7799808122801406) internal successors, (8693), 3127 states have internal predecessors, (8693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:58,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8693 transitions. [2021-05-21 15:47:58,227 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8693 transitions. Word has length 115 [2021-05-21 15:47:58,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:58,227 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8693 transitions. [2021-05-21 15:47:58,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:58,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8693 transitions. [2021-05-21 15:47:58,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:47:58,229 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:58,230 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:58,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2021-05-21 15:47:58,431 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:58,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:58,431 INFO L82 PathProgramCache]: Analyzing trace with hash 158488406, now seen corresponding path program 139 times [2021-05-21 15:47:58,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:58,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544383420] [2021-05-21 15:47:58,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:58,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:58,586 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:58,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:58,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544383420] [2021-05-21 15:47:58,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544383420] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:58,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445218555] [2021-05-21 15:47:58,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:58,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:58,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:47:58,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:58,785 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:58,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445218555] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:58,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:58,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-05-21 15:47:58,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459135985] [2021-05-21 15:47:58,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:47:58,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:58,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:47:58,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:47:58,786 INFO L87 Difference]: Start difference. First operand 3128 states and 8693 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:59,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:47:59,317 INFO L93 Difference]: Finished difference Result 4396 states and 11432 transitions. [2021-05-21 15:47:59,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:47:59,318 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:47:59,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:47:59,322 INFO L225 Difference]: With dead ends: 4396 [2021-05-21 15:47:59,322 INFO L226 Difference]: Without dead ends: 4126 [2021-05-21 15:47:59,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 528.7ms TimeCoverageRelationStatistics Valid=677, Invalid=2185, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 15:47:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-05-21 15:47:59,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 3203. [2021-05-21 15:47:59,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7851342910680823) internal successors, (8918), 3202 states have internal predecessors, (8918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:59,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8918 transitions. [2021-05-21 15:47:59,370 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8918 transitions. Word has length 115 [2021-05-21 15:47:59,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:47:59,370 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8918 transitions. [2021-05-21 15:47:59,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:47:59,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8918 transitions. [2021-05-21 15:47:59,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:47:59,372 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:47:59,372 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:47:59,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:59,577 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:47:59,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:47:59,577 INFO L82 PathProgramCache]: Analyzing trace with hash 612704580, now seen corresponding path program 140 times [2021-05-21 15:47:59,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:47:59,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736060913] [2021-05-21 15:47:59,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:47:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:47:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:59,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:47:59,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736060913] [2021-05-21 15:47:59,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736060913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:59,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164176745] [2021-05-21 15:47:59,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:47:59,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:47:59,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:47:59,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:47:59,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:47:59,909 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:47:59,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164176745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:47:59,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:47:59,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-05-21 15:47:59,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365074691] [2021-05-21 15:47:59,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:47:59,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:47:59,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:47:59,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:47:59,910 INFO L87 Difference]: Start difference. First operand 3203 states and 8918 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:00,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:00,363 INFO L93 Difference]: Finished difference Result 4421 states and 11557 transitions. [2021-05-21 15:48:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:48:00,363 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:48:00,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:00,367 INFO L225 Difference]: With dead ends: 4421 [2021-05-21 15:48:00,367 INFO L226 Difference]: Without dead ends: 4151 [2021-05-21 15:48:00,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 449.3ms TimeCoverageRelationStatistics Valid=719, Invalid=2143, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 15:48:00,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4151 states. [2021-05-21 15:48:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4151 to 3278. [2021-05-21 15:48:00,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.790051876716509) internal successors, (9143), 3277 states have internal predecessors, (9143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:00,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9143 transitions. [2021-05-21 15:48:00,404 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9143 transitions. Word has length 115 [2021-05-21 15:48:00,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:00,404 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9143 transitions. [2021-05-21 15:48:00,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:00,404 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9143 transitions. [2021-05-21 15:48:00,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:48:00,406 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:00,406 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:00,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable152 [2021-05-21 15:48:00,607 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:00,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:00,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1611600916, now seen corresponding path program 141 times [2021-05-21 15:48:00,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:00,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982261809] [2021-05-21 15:48:00,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:00,752 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:00,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:00,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982261809] [2021-05-21 15:48:00,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982261809] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:00,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901023857] [2021-05-21 15:48:00,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:00,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 15:48:00,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:00,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:48:00,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:00,954 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:00,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901023857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:00,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:00,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-05-21 15:48:00,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721094537] [2021-05-21 15:48:00,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:48:00,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:00,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:48:00,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:48:00,955 INFO L87 Difference]: Start difference. First operand 3278 states and 9143 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:01,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:01,524 INFO L93 Difference]: Finished difference Result 4446 states and 11682 transitions. [2021-05-21 15:48:01,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:48:01,524 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:48:01,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:01,528 INFO L225 Difference]: With dead ends: 4446 [2021-05-21 15:48:01,528 INFO L226 Difference]: Without dead ends: 4176 [2021-05-21 15:48:01,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 558.0ms TimeCoverageRelationStatistics Valid=715, Invalid=2365, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 15:48:01,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-05-21 15:48:01,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3353. [2021-05-21 15:48:01,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7947494033412887) internal successors, (9368), 3352 states have internal predecessors, (9368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:01,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9368 transitions. [2021-05-21 15:48:01,562 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9368 transitions. Word has length 115 [2021-05-21 15:48:01,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:01,562 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9368 transitions. [2021-05-21 15:48:01,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:01,563 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9368 transitions. [2021-05-21 15:48:01,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:48:01,565 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:01,565 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:01,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:01,765 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:01,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:01,765 INFO L82 PathProgramCache]: Analyzing trace with hash -267726974, now seen corresponding path program 142 times [2021-05-21 15:48:01,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:01,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367835941] [2021-05-21 15:48:01,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:01,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:01,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:01,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367835941] [2021-05-21 15:48:01,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367835941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:01,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052024396] [2021-05-21 15:48:01,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:01,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:48:01,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:01,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:48:01,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:02,086 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:02,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052024396] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:02,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:02,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-05-21 15:48:02,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761699389] [2021-05-21 15:48:02,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:48:02,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:02,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:48:02,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:48:02,087 INFO L87 Difference]: Start difference. First operand 3353 states and 9368 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:02,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:02,573 INFO L93 Difference]: Finished difference Result 4471 states and 11807 transitions. [2021-05-21 15:48:02,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:48:02,573 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:48:02,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:02,577 INFO L225 Difference]: With dead ends: 4471 [2021-05-21 15:48:02,577 INFO L226 Difference]: Without dead ends: 4201 [2021-05-21 15:48:02,578 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 471.1ms TimeCoverageRelationStatistics Valid=804, Invalid=2276, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 15:48:02,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-05-21 15:48:02,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3428. [2021-05-21 15:48:02,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7992413189378467) internal successors, (9593), 3427 states have internal predecessors, (9593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:02,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9593 transitions. [2021-05-21 15:48:02,613 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9593 transitions. Word has length 115 [2021-05-21 15:48:02,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:02,613 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9593 transitions. [2021-05-21 15:48:02,613 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:02,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9593 transitions. [2021-05-21 15:48:02,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:48:02,616 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:02,616 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:02,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:02,816 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:02,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:02,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1762592338, now seen corresponding path program 143 times [2021-05-21 15:48:02,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:02,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941807574] [2021-05-21 15:48:02,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:02,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:02,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:02,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941807574] [2021-05-21 15:48:02,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941807574] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:02,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117955663] [2021-05-21 15:48:02,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:03,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-05-21 15:48:03,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:03,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:48:03,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:03,185 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:03,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117955663] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:03,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:03,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-05-21 15:48:03,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682307533] [2021-05-21 15:48:03,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:48:03,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:03,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:48:03,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:48:03,186 INFO L87 Difference]: Start difference. First operand 3428 states and 9593 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:03,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:03,814 INFO L93 Difference]: Finished difference Result 4496 states and 11932 transitions. [2021-05-21 15:48:03,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:48:03,815 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:48:03,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:03,819 INFO L225 Difference]: With dead ends: 4496 [2021-05-21 15:48:03,819 INFO L226 Difference]: Without dead ends: 4226 [2021-05-21 15:48:03,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 605.0ms TimeCoverageRelationStatistics Valid=835, Invalid=2471, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 15:48:03,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-05-21 15:48:03,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3503. [2021-05-21 15:48:03,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.803540833809252) internal successors, (9818), 3502 states have internal predecessors, (9818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:03,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9818 transitions. [2021-05-21 15:48:03,859 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9818 transitions. Word has length 115 [2021-05-21 15:48:03,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:03,860 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9818 transitions. [2021-05-21 15:48:03,860 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:03,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9818 transitions. [2021-05-21 15:48:03,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:48:03,862 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:03,862 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:04,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:04,065 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:04,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:04,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1918135488, now seen corresponding path program 144 times [2021-05-21 15:48:04,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:04,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419348651] [2021-05-21 15:48:04,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:04,205 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:04,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:04,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419348651] [2021-05-21 15:48:04,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419348651] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:04,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709713987] [2021-05-21 15:48:04,206 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:04,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-05-21 15:48:04,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:04,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:48:04,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:04,394 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:04,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709713987] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:04,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:04,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-05-21 15:48:04,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003720782] [2021-05-21 15:48:04,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:48:04,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:04,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:48:04,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:48:04,395 INFO L87 Difference]: Start difference. First operand 3503 states and 9818 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:04,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:04,919 INFO L93 Difference]: Finished difference Result 4566 states and 12177 transitions. [2021-05-21 15:48:04,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:48:04,920 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:48:04,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:04,924 INFO L225 Difference]: With dead ends: 4566 [2021-05-21 15:48:04,924 INFO L226 Difference]: Without dead ends: 4296 [2021-05-21 15:48:04,925 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 502.7ms TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 15:48:04,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4296 states. [2021-05-21 15:48:04,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4296 to 3578. [2021-05-21 15:48:04,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.8118535085266982) internal successors, (10058), 3577 states have internal predecessors, (10058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:04,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 10058 transitions. [2021-05-21 15:48:04,976 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 10058 transitions. Word has length 115 [2021-05-21 15:48:04,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:04,976 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 10058 transitions. [2021-05-21 15:48:04,977 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:04,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 10058 transitions. [2021-05-21 15:48:04,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:48:04,979 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:04,979 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:05,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-05-21 15:48:05,180 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:05,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:05,180 INFO L82 PathProgramCache]: Analyzing trace with hash 661589520, now seen corresponding path program 145 times [2021-05-21 15:48:05,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:05,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627801196] [2021-05-21 15:48:05,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:05,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:05,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:05,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627801196] [2021-05-21 15:48:05,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627801196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:05,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968496768] [2021-05-21 15:48:05,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:05,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-21 15:48:05,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:05,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968496768] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:05,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:05,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-05-21 15:48:05,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795150254] [2021-05-21 15:48:05,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:48:05,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:05,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:48:05,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:48:05,546 INFO L87 Difference]: Start difference. First operand 3578 states and 10058 transitions. Second operand has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:06,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:06,251 INFO L93 Difference]: Finished difference Result 5144 states and 13803 transitions. [2021-05-21 15:48:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:48:06,252 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:48:06,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:06,256 INFO L225 Difference]: With dead ends: 5144 [2021-05-21 15:48:06,256 INFO L226 Difference]: Without dead ends: 4521 [2021-05-21 15:48:06,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 677.7ms TimeCoverageRelationStatistics Valid=961, Invalid=2821, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 15:48:06,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-05-21 15:48:06,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3653. [2021-05-21 15:48:06,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.8170865279299013) internal successors, (10288), 3652 states have internal predecessors, (10288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:06,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10288 transitions. [2021-05-21 15:48:06,295 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10288 transitions. Word has length 115 [2021-05-21 15:48:06,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:06,295 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10288 transitions. [2021-05-21 15:48:06,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.958333333333333) internal successors, (119), 24 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:06,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10288 transitions. [2021-05-21 15:48:06,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:48:06,297 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:06,298 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:06,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-05-21 15:48:06,498 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:06,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:06,498 INFO L82 PathProgramCache]: Analyzing trace with hash -371058082, now seen corresponding path program 146 times [2021-05-21 15:48:06,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:06,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771636786] [2021-05-21 15:48:06,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:06,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:06,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771636786] [2021-05-21 15:48:06,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771636786] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:06,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946692276] [2021-05-21 15:48:06,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:06,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:48:06,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:06,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:48:06,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:06,817 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:06,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946692276] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:06,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:06,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-05-21 15:48:06,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354037281] [2021-05-21 15:48:06,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 15:48:06,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:06,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 15:48:06,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-05-21 15:48:06,818 INFO L87 Difference]: Start difference. First operand 3653 states and 10288 transitions. Second operand has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:07,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:07,386 INFO L93 Difference]: Finished difference Result 5348 states and 14471 transitions. [2021-05-21 15:48:07,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:48:07,386 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:48:07,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:07,392 INFO L225 Difference]: With dead ends: 5348 [2021-05-21 15:48:07,392 INFO L226 Difference]: Without dead ends: 5078 [2021-05-21 15:48:07,393 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 529.7ms TimeCoverageRelationStatistics Valid=1023, Invalid=2517, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 15:48:07,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2021-05-21 15:48:07,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 3833. [2021-05-21 15:48:07,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 2.8306367432150314) internal successors, (10847), 3832 states have internal predecessors, (10847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:07,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 10847 transitions. [2021-05-21 15:48:07,441 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 10847 transitions. Word has length 115 [2021-05-21 15:48:07,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:07,441 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 10847 transitions. [2021-05-21 15:48:07,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 5.086956521739131) internal successors, (117), 23 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:07,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 10847 transitions. [2021-05-21 15:48:07,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-05-21 15:48:07,444 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:07,444 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:07,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-05-21 15:48:07,644 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:07,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:07,645 INFO L82 PathProgramCache]: Analyzing trace with hash -348714832, now seen corresponding path program 147 times [2021-05-21 15:48:07,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:07,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967414825] [2021-05-21 15:48:07,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:07,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:07,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967414825] [2021-05-21 15:48:07,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967414825] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:07,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448101842] [2021-05-21 15:48:07,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:07,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-05-21 15:48:07,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:07,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:48:07,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 275 backedges. 0 proven. 275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:07,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448101842] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:07,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:07,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-05-21 15:48:07,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401663610] [2021-05-21 15:48:07,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:48:07,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:07,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:48:07,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:48:07,983 INFO L87 Difference]: Start difference. First operand 3833 states and 10847 transitions. Second operand has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:08,734 INFO L93 Difference]: Finished difference Result 5216 states and 14136 transitions. [2021-05-21 15:48:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:48:08,734 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-05-21 15:48:08,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:08,738 INFO L225 Difference]: With dead ends: 5216 [2021-05-21 15:48:08,738 INFO L226 Difference]: Without dead ends: 4641 [2021-05-21 15:48:08,738 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1088 ImplicationChecksByTransitivity, 703.1ms TimeCoverageRelationStatistics Valid=1013, Invalid=3147, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 15:48:08,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4641 states. [2021-05-21 15:48:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4641 to 2524. [2021-05-21 15:48:08,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 2.737217598097503) internal successors, (6906), 2523 states have internal predecessors, (6906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:08,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 6906 transitions. [2021-05-21 15:48:08,765 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 6906 transitions. Word has length 115 [2021-05-21 15:48:08,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:08,765 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 6906 transitions. [2021-05-21 15:48:08,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 4.916666666666667) internal successors, (118), 24 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:08,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 6906 transitions. [2021-05-21 15:48:08,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:08,766 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:08,767 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:08,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-05-21 15:48:08,980 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:08,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:08,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1146705884, now seen corresponding path program 148 times [2021-05-21 15:48:08,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:08,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441586836] [2021-05-21 15:48:08,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:08,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:09,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:09,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441586836] [2021-05-21 15:48:09,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441586836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:09,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749495046] [2021-05-21 15:48:09,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:09,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:48:09,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:09,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:48:09,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:09,400 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:09,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749495046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:09,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:09,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 27 [2021-05-21 15:48:09,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616926595] [2021-05-21 15:48:09,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-21 15:48:09,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:09,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-21 15:48:09,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-05-21 15:48:09,401 INFO L87 Difference]: Start difference. First operand 2524 states and 6906 transitions. Second operand has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:09,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:09,800 INFO L93 Difference]: Finished difference Result 3614 states and 9406 transitions. [2021-05-21 15:48:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:48:09,800 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:09,804 INFO L225 Difference]: With dead ends: 3614 [2021-05-21 15:48:09,804 INFO L226 Difference]: Without dead ends: 3280 [2021-05-21 15:48:09,804 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 464.6ms TimeCoverageRelationStatistics Valid=680, Invalid=1870, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 15:48:09,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3280 states. [2021-05-21 15:48:09,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3280 to 2609. [2021-05-21 15:48:09,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2609 states, 2608 states have (on average 2.71319018404908) internal successors, (7076), 2608 states have internal predecessors, (7076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:09,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2609 states to 2609 states and 7076 transitions. [2021-05-21 15:48:09,827 INFO L78 Accepts]: Start accepts. Automaton has 2609 states and 7076 transitions. Word has length 120 [2021-05-21 15:48:09,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:09,827 INFO L482 AbstractCegarLoop]: Abstraction has 2609 states and 7076 transitions. [2021-05-21 15:48:09,828 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 5.555555555555555) internal successors, (150), 27 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:09,828 INFO L276 IsEmpty]: Start isEmpty. Operand 2609 states and 7076 transitions. [2021-05-21 15:48:09,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:09,829 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:09,829 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:10,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:10,042 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:10,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:10,042 INFO L82 PathProgramCache]: Analyzing trace with hash 51245472, now seen corresponding path program 149 times [2021-05-21 15:48:10,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:10,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453692233] [2021-05-21 15:48:10,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:10,239 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:10,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:10,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453692233] [2021-05-21 15:48:10,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453692233] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:10,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032464130] [2021-05-21 15:48:10,239 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:10,294 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 15:48:10,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:10,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:48:10,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:10,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032464130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:10,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:10,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:48:10,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205770034] [2021-05-21 15:48:10,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:48:10,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:10,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:48:10,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=425, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:48:10,441 INFO L87 Difference]: Start difference. First operand 2609 states and 7076 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:10,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:10,758 INFO L93 Difference]: Finished difference Result 4436 states and 10987 transitions. [2021-05-21 15:48:10,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-21 15:48:10,758 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:10,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:10,762 INFO L225 Difference]: With dead ends: 4436 [2021-05-21 15:48:10,762 INFO L226 Difference]: Without dead ends: 4166 [2021-05-21 15:48:10,762 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 392.5ms TimeCoverageRelationStatistics Valid=543, Invalid=1437, Unknown=0, NotChecked=0, Total=1980 [2021-05-21 15:48:10,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-05-21 15:48:10,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 2753. [2021-05-21 15:48:10,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2753 states, 2752 states have (on average 2.722747093023256) internal successors, (7493), 2752 states have internal predecessors, (7493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:10,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2753 states to 2753 states and 7493 transitions. [2021-05-21 15:48:10,789 INFO L78 Accepts]: Start accepts. Automaton has 2753 states and 7493 transitions. Word has length 120 [2021-05-21 15:48:10,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:10,789 INFO L482 AbstractCegarLoop]: Abstraction has 2753 states and 7493 transitions. [2021-05-21 15:48:10,789 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:10,789 INFO L276 IsEmpty]: Start isEmpty. Operand 2753 states and 7493 transitions. [2021-05-21 15:48:10,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:10,791 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:10,791 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:10,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:10,991 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:10,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:10,991 INFO L82 PathProgramCache]: Analyzing trace with hash -847277968, now seen corresponding path program 150 times [2021-05-21 15:48:10,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:10,992 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255847921] [2021-05-21 15:48:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:11,185 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:11,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:11,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255847921] [2021-05-21 15:48:11,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255847921] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:11,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332199422] [2021-05-21 15:48:11,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:11,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-21 15:48:11,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:11,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:48:11,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:11,406 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:11,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332199422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:11,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:11,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-05-21 15:48:11,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429502184] [2021-05-21 15:48:11,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:11,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:11,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:11,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:11,407 INFO L87 Difference]: Start difference. First operand 2753 states and 7493 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:11,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:11,794 INFO L93 Difference]: Finished difference Result 4396 states and 10982 transitions. [2021-05-21 15:48:11,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:48:11,794 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:11,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:11,798 INFO L225 Difference]: With dead ends: 4396 [2021-05-21 15:48:11,798 INFO L226 Difference]: Without dead ends: 4126 [2021-05-21 15:48:11,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 457.1ms TimeCoverageRelationStatistics Valid=608, Invalid=1744, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 15:48:11,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4126 states. [2021-05-21 15:48:11,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4126 to 2828. [2021-05-21 15:48:11,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2828 states, 2827 states have (on average 2.73010258224266) internal successors, (7718), 2827 states have internal predecessors, (7718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:11,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2828 states to 2828 states and 7718 transitions. [2021-05-21 15:48:11,829 INFO L78 Accepts]: Start accepts. Automaton has 2828 states and 7718 transitions. Word has length 120 [2021-05-21 15:48:11,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:11,830 INFO L482 AbstractCegarLoop]: Abstraction has 2828 states and 7718 transitions. [2021-05-21 15:48:11,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:11,830 INFO L276 IsEmpty]: Start isEmpty. Operand 2828 states and 7718 transitions. [2021-05-21 15:48:11,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:11,832 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:11,832 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:12,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:12,032 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:12,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:12,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1832735838, now seen corresponding path program 151 times [2021-05-21 15:48:12,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:12,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338666715] [2021-05-21 15:48:12,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:12,222 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:12,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:12,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338666715] [2021-05-21 15:48:12,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338666715] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:12,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118745681] [2021-05-21 15:48:12,222 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:12,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:48:12,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:12,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118745681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:12,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:12,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:48:12,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767113057] [2021-05-21 15:48:12,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:48:12,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:12,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:48:12,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=440, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:48:12,424 INFO L87 Difference]: Start difference. First operand 2828 states and 7718 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:12,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:12,785 INFO L93 Difference]: Finished difference Result 4446 states and 11157 transitions. [2021-05-21 15:48:12,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-21 15:48:12,785 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:12,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:12,789 INFO L225 Difference]: With dead ends: 4446 [2021-05-21 15:48:12,789 INFO L226 Difference]: Without dead ends: 4176 [2021-05-21 15:48:12,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 411.5ms TimeCoverageRelationStatistics Valid=549, Invalid=1613, Unknown=0, NotChecked=0, Total=2162 [2021-05-21 15:48:12,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-05-21 15:48:12,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 2903. [2021-05-21 15:48:12,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2903 states, 2902 states have (on average 2.7370778773259823) internal successors, (7943), 2902 states have internal predecessors, (7943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:12,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2903 states to 2903 states and 7943 transitions. [2021-05-21 15:48:12,817 INFO L78 Accepts]: Start accepts. Automaton has 2903 states and 7943 transitions. Word has length 120 [2021-05-21 15:48:12,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:12,817 INFO L482 AbstractCegarLoop]: Abstraction has 2903 states and 7943 transitions. [2021-05-21 15:48:12,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:12,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2903 states and 7943 transitions. [2021-05-21 15:48:12,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:12,819 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:12,819 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:13,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:13,020 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:13,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:13,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1452291886, now seen corresponding path program 152 times [2021-05-21 15:48:13,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:13,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022309523] [2021-05-21 15:48:13,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:13,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:13,207 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:13,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:13,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022309523] [2021-05-21 15:48:13,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022309523] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:13,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921402001] [2021-05-21 15:48:13,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:13,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:48:13,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:13,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:48:13,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:13,445 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:13,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921402001] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:13,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:13,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-05-21 15:48:13,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085335948] [2021-05-21 15:48:13,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:13,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:13,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:13,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:13,446 INFO L87 Difference]: Start difference. First operand 2903 states and 7943 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:13,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:13,903 INFO L93 Difference]: Finished difference Result 4471 states and 11282 transitions. [2021-05-21 15:48:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:48:13,903 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:13,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:13,907 INFO L225 Difference]: With dead ends: 4471 [2021-05-21 15:48:13,907 INFO L226 Difference]: Without dead ends: 4201 [2021-05-21 15:48:13,907 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=622, Invalid=1928, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 15:48:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-05-21 15:48:13,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 2978. [2021-05-21 15:48:13,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2978 states, 2977 states have (on average 2.7437017131340276) internal successors, (8168), 2977 states have internal predecessors, (8168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:13,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2978 states to 2978 states and 8168 transitions. [2021-05-21 15:48:13,946 INFO L78 Accepts]: Start accepts. Automaton has 2978 states and 8168 transitions. Word has length 120 [2021-05-21 15:48:13,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:13,946 INFO L482 AbstractCegarLoop]: Abstraction has 2978 states and 8168 transitions. [2021-05-21 15:48:13,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:13,946 INFO L276 IsEmpty]: Start isEmpty. Operand 2978 states and 8168 transitions. [2021-05-21 15:48:13,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:13,948 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:13,948 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:14,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:14,161 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:14,161 INFO L82 PathProgramCache]: Analyzing trace with hash 2076667036, now seen corresponding path program 153 times [2021-05-21 15:48:14,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:14,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317331719] [2021-05-21 15:48:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:14,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:14,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:14,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317331719] [2021-05-21 15:48:14,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317331719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:14,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365982478] [2021-05-21 15:48:14,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:14,395 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-21 15:48:14,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:14,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-21 15:48:14,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:14,564 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:14,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365982478] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:14,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:14,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:48:14,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720872883] [2021-05-21 15:48:14,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:48:14,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:14,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:48:14,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:48:14,565 INFO L87 Difference]: Start difference. First operand 2978 states and 8168 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:14,979 INFO L93 Difference]: Finished difference Result 4496 states and 11407 transitions. [2021-05-21 15:48:14,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-21 15:48:14,979 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:14,983 INFO L225 Difference]: With dead ends: 4496 [2021-05-21 15:48:14,983 INFO L226 Difference]: Without dead ends: 4226 [2021-05-21 15:48:14,983 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 427.1ms TimeCoverageRelationStatistics Valid=571, Invalid=1781, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 15:48:14,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4226 states. [2021-05-21 15:48:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4226 to 3053. [2021-05-21 15:48:15,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3053 states, 3052 states have (on average 2.75) internal successors, (8393), 3052 states have internal predecessors, (8393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:15,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3053 states to 3053 states and 8393 transitions. [2021-05-21 15:48:15,022 INFO L78 Accepts]: Start accepts. Automaton has 3053 states and 8393 transitions. Word has length 120 [2021-05-21 15:48:15,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:15,022 INFO L482 AbstractCegarLoop]: Abstraction has 3053 states and 8393 transitions. [2021-05-21 15:48:15,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3053 states and 8393 transitions. [2021-05-21 15:48:15,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:15,024 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:15,024 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:15,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:15,225 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:15,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:15,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1409248404, now seen corresponding path program 154 times [2021-05-21 15:48:15,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:15,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377006164] [2021-05-21 15:48:15,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:15,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:15,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377006164] [2021-05-21 15:48:15,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377006164] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:15,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69655528] [2021-05-21 15:48:15,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:15,457 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:48:15,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:15,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:48:15,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:15,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69655528] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:15,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:15,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-05-21 15:48:15,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073900834] [2021-05-21 15:48:15,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:15,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:15,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:15,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:15,613 INFO L87 Difference]: Start difference. First operand 3053 states and 8393 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:16,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:16,128 INFO L93 Difference]: Finished difference Result 4521 states and 11532 transitions. [2021-05-21 15:48:16,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:48:16,129 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:16,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:16,133 INFO L225 Difference]: With dead ends: 4521 [2021-05-21 15:48:16,133 INFO L226 Difference]: Without dead ends: 4251 [2021-05-21 15:48:16,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 523.2ms TimeCoverageRelationStatistics Valid=652, Invalid=2104, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 15:48:16,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-05-21 15:48:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3128. [2021-05-21 15:48:16,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3128 states, 3127 states have (on average 2.7559961624560283) internal successors, (8618), 3127 states have internal predecessors, (8618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:16,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3128 states to 3128 states and 8618 transitions. [2021-05-21 15:48:16,182 INFO L78 Accepts]: Start accepts. Automaton has 3128 states and 8618 transitions. Word has length 120 [2021-05-21 15:48:16,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:16,182 INFO L482 AbstractCegarLoop]: Abstraction has 3128 states and 8618 transitions. [2021-05-21 15:48:16,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:16,182 INFO L276 IsEmpty]: Start isEmpty. Operand 3128 states and 8618 transitions. [2021-05-21 15:48:16,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:16,184 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:16,184 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:16,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-05-21 15:48:16,385 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:16,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1493768794, now seen corresponding path program 155 times [2021-05-21 15:48:16,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:16,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350795282] [2021-05-21 15:48:16,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:16,548 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:16,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:16,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350795282] [2021-05-21 15:48:16,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350795282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:16,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382615736] [2021-05-21 15:48:16,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:16,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 15:48:16,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:16,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:48:16,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:16,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382615736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:16,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:16,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:48:16,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84534920] [2021-05-21 15:48:16,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:48:16,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:16,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:48:16,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:48:16,748 INFO L87 Difference]: Start difference. First operand 3128 states and 8618 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:17,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:17,185 INFO L93 Difference]: Finished difference Result 4546 states and 11657 transitions. [2021-05-21 15:48:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:48:17,186 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:17,190 INFO L225 Difference]: With dead ends: 4546 [2021-05-21 15:48:17,190 INFO L226 Difference]: Without dead ends: 4276 [2021-05-21 15:48:17,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 445.6ms TimeCoverageRelationStatistics Valid=609, Invalid=1941, Unknown=0, NotChecked=0, Total=2550 [2021-05-21 15:48:17,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4276 states. [2021-05-21 15:48:17,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4276 to 3203. [2021-05-21 15:48:17,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3203 states, 3202 states have (on average 2.7617114303560273) internal successors, (8843), 3202 states have internal predecessors, (8843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:17,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 8843 transitions. [2021-05-21 15:48:17,229 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 8843 transitions. Word has length 120 [2021-05-21 15:48:17,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:17,229 INFO L482 AbstractCegarLoop]: Abstraction has 3203 states and 8843 transitions. [2021-05-21 15:48:17,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:17,229 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 8843 transitions. [2021-05-21 15:48:17,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:17,231 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:17,231 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:17,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2021-05-21 15:48:17,432 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:17,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:17,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1248691498, now seen corresponding path program 156 times [2021-05-21 15:48:17,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:17,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239071808] [2021-05-21 15:48:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:17,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:17,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239071808] [2021-05-21 15:48:17,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239071808] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:17,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516836274] [2021-05-21 15:48:17,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:17,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-21 15:48:17,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:17,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:48:17,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:17,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516836274] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:17,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:17,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-05-21 15:48:17,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258113711] [2021-05-21 15:48:17,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:17,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:17,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:17,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:17,821 INFO L87 Difference]: Start difference. First operand 3203 states and 8843 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:18,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:18,375 INFO L93 Difference]: Finished difference Result 4571 states and 11782 transitions. [2021-05-21 15:48:18,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:48:18,376 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:18,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:18,380 INFO L225 Difference]: With dead ends: 4571 [2021-05-21 15:48:18,380 INFO L226 Difference]: Without dead ends: 4301 [2021-05-21 15:48:18,380 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 617 ImplicationChecksByTransitivity, 559.2ms TimeCoverageRelationStatistics Valid=698, Invalid=2272, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 15:48:18,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4301 states. [2021-05-21 15:48:18,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4301 to 3278. [2021-05-21 15:48:18,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3278 states, 3277 states have (on average 2.767165090021361) internal successors, (9068), 3277 states have internal predecessors, (9068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:18,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3278 states to 3278 states and 9068 transitions. [2021-05-21 15:48:18,420 INFO L78 Accepts]: Start accepts. Automaton has 3278 states and 9068 transitions. Word has length 120 [2021-05-21 15:48:18,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:18,420 INFO L482 AbstractCegarLoop]: Abstraction has 3278 states and 9068 transitions. [2021-05-21 15:48:18,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3278 states and 9068 transitions. [2021-05-21 15:48:18,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:18,422 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:18,423 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:18,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-05-21 15:48:18,623 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:18,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:18,623 INFO L82 PathProgramCache]: Analyzing trace with hash 871841176, now seen corresponding path program 157 times [2021-05-21 15:48:18,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:18,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018220839] [2021-05-21 15:48:18,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:18,779 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:18,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:18,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018220839] [2021-05-21 15:48:18,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018220839] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:18,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523245082] [2021-05-21 15:48:18,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:18,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:48:18,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:18,971 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:18,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523245082] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:18,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:18,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:48:18,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20461955] [2021-05-21 15:48:18,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:48:18,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:18,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:48:18,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:48:18,972 INFO L87 Difference]: Start difference. First operand 3278 states and 9068 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:19,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:19,426 INFO L93 Difference]: Finished difference Result 4596 states and 11907 transitions. [2021-05-21 15:48:19,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:48:19,426 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:19,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:19,430 INFO L225 Difference]: With dead ends: 4596 [2021-05-21 15:48:19,430 INFO L226 Difference]: Without dead ends: 4326 [2021-05-21 15:48:19,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 466.1ms TimeCoverageRelationStatistics Valid=663, Invalid=2093, Unknown=0, NotChecked=0, Total=2756 [2021-05-21 15:48:19,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-05-21 15:48:19,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3353. [2021-05-21 15:48:19,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3353 states, 3352 states have (on average 2.7723747016706444) internal successors, (9293), 3352 states have internal predecessors, (9293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:19,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3353 states to 3353 states and 9293 transitions. [2021-05-21 15:48:19,468 INFO L78 Accepts]: Start accepts. Automaton has 3353 states and 9293 transitions. Word has length 120 [2021-05-21 15:48:19,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:19,468 INFO L482 AbstractCegarLoop]: Abstraction has 3353 states and 9293 transitions. [2021-05-21 15:48:19,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:19,469 INFO L276 IsEmpty]: Start isEmpty. Operand 3353 states and 9293 transitions. [2021-05-21 15:48:19,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:19,471 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:19,471 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:19,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-05-21 15:48:19,671 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:19,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:19,672 INFO L82 PathProgramCache]: Analyzing trace with hash -2096370584, now seen corresponding path program 158 times [2021-05-21 15:48:19,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:19,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711990814] [2021-05-21 15:48:19,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:19,834 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:19,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:19,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711990814] [2021-05-21 15:48:19,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711990814] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:19,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732736674] [2021-05-21 15:48:19,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:19,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:48:19,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:19,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:48:19,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:20,059 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:20,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732736674] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:20,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:20,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-05-21 15:48:20,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525322644] [2021-05-21 15:48:20,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:20,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:20,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:20,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:20,060 INFO L87 Difference]: Start difference. First operand 3353 states and 9293 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:20,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:20,673 INFO L93 Difference]: Finished difference Result 4621 states and 12032 transitions. [2021-05-21 15:48:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:48:20,674 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:20,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:20,678 INFO L225 Difference]: With dead ends: 4621 [2021-05-21 15:48:20,678 INFO L226 Difference]: Without dead ends: 4351 [2021-05-21 15:48:20,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 697 ImplicationChecksByTransitivity, 606.9ms TimeCoverageRelationStatistics Valid=760, Invalid=2432, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 15:48:20,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-05-21 15:48:20,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3428. [2021-05-21 15:48:20,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3428 states, 3427 states have (on average 2.7773562882988037) internal successors, (9518), 3427 states have internal predecessors, (9518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:20,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 9518 transitions. [2021-05-21 15:48:20,720 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 9518 transitions. Word has length 120 [2021-05-21 15:48:20,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:20,720 INFO L482 AbstractCegarLoop]: Abstraction has 3428 states and 9518 transitions. [2021-05-21 15:48:20,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 9518 transitions. [2021-05-21 15:48:20,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:20,723 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:20,723 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:20,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:20,924 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:20,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:20,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1642154410, now seen corresponding path program 159 times [2021-05-21 15:48:20,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:20,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791253756] [2021-05-21 15:48:20,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:21,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:21,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791253756] [2021-05-21 15:48:21,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791253756] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:21,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835640028] [2021-05-21 15:48:21,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:21,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-21 15:48:21,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:21,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-21 15:48:21,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:21,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835640028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:21,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:21,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:48:21,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021323474] [2021-05-21 15:48:21,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:48:21,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:21,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:48:21,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:48:21,274 INFO L87 Difference]: Start difference. First operand 3428 states and 9518 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:21,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:21,825 INFO L93 Difference]: Finished difference Result 4646 states and 12157 transitions. [2021-05-21 15:48:21,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:48:21,825 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:21,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:21,828 INFO L225 Difference]: With dead ends: 4646 [2021-05-21 15:48:21,828 INFO L226 Difference]: Without dead ends: 4376 [2021-05-21 15:48:21,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 491.5ms TimeCoverageRelationStatistics Valid=733, Invalid=2237, Unknown=0, NotChecked=0, Total=2970 [2021-05-21 15:48:21,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2021-05-21 15:48:21,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 3503. [2021-05-21 15:48:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3503 states, 3502 states have (on average 2.7821245002855512) internal successors, (9743), 3502 states have internal predecessors, (9743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3503 states to 3503 states and 9743 transitions. [2021-05-21 15:48:21,866 INFO L78 Accepts]: Start accepts. Automaton has 3503 states and 9743 transitions. Word has length 120 [2021-05-21 15:48:21,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:21,866 INFO L482 AbstractCegarLoop]: Abstraction has 3503 states and 9743 transitions. [2021-05-21 15:48:21,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:21,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3503 states and 9743 transitions. [2021-05-21 15:48:21,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:21,869 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:21,869 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:22,069 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-05-21 15:48:22,069 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:22,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:22,070 INFO L82 PathProgramCache]: Analyzing trace with hash -643258074, now seen corresponding path program 160 times [2021-05-21 15:48:22,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:22,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602199320] [2021-05-21 15:48:22,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:22,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:22,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602199320] [2021-05-21 15:48:22,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602199320] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:22,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203106909] [2021-05-21 15:48:22,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:22,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:48:22,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:22,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:48:22,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:22,418 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:22,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203106909] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:22,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:22,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-05-21 15:48:22,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491590023] [2021-05-21 15:48:22,419 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:22,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:22,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:22,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=508, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:22,419 INFO L87 Difference]: Start difference. First operand 3503 states and 9743 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:23,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:23,077 INFO L93 Difference]: Finished difference Result 4671 states and 12282 transitions. [2021-05-21 15:48:23,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:48:23,078 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:23,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:23,083 INFO L225 Difference]: With dead ends: 4671 [2021-05-21 15:48:23,083 INFO L226 Difference]: Without dead ends: 4401 [2021-05-21 15:48:23,084 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 612.7ms TimeCoverageRelationStatistics Valid=838, Invalid=2584, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:48:23,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-05-21 15:48:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 3578. [2021-05-21 15:48:23,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3578 states, 3577 states have (on average 2.786692759295499) internal successors, (9968), 3577 states have internal predecessors, (9968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3578 states to 3578 states and 9968 transitions. [2021-05-21 15:48:23,124 INFO L78 Accepts]: Start accepts. Automaton has 3578 states and 9968 transitions. Word has length 120 [2021-05-21 15:48:23,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:23,124 INFO L482 AbstractCegarLoop]: Abstraction has 3578 states and 9968 transitions. [2021-05-21 15:48:23,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:23,124 INFO L276 IsEmpty]: Start isEmpty. Operand 3578 states and 9968 transitions. [2021-05-21 15:48:23,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:23,127 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:23,127 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:23,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:23,327 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:23,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:23,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1772381332, now seen corresponding path program 161 times [2021-05-21 15:48:23,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:23,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307351504] [2021-05-21 15:48:23,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:23,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:23,478 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:23,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:23,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307351504] [2021-05-21 15:48:23,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307351504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:23,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696893596] [2021-05-21 15:48:23,479 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:23,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 15:48:23,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:23,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:48:23,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:23,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696893596] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:23,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:23,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:48:23,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099756331] [2021-05-21 15:48:23,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:48:23,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:23,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:48:23,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:48:23,687 INFO L87 Difference]: Start difference. First operand 3578 states and 9968 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:24,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:24,245 INFO L93 Difference]: Finished difference Result 4696 states and 12407 transitions. [2021-05-21 15:48:24,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:48:24,245 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:24,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:24,250 INFO L225 Difference]: With dead ends: 4696 [2021-05-21 15:48:24,250 INFO L226 Difference]: Without dead ends: 4426 [2021-05-21 15:48:24,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 518.4ms TimeCoverageRelationStatistics Valid=819, Invalid=2373, Unknown=0, NotChecked=0, Total=3192 [2021-05-21 15:48:24,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4426 states. [2021-05-21 15:48:24,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4426 to 3653. [2021-05-21 15:48:24,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3653 states, 3652 states have (on average 2.7910733844468782) internal successors, (10193), 3652 states have internal predecessors, (10193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:24,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3653 states to 3653 states and 10193 transitions. [2021-05-21 15:48:24,294 INFO L78 Accepts]: Start accepts. Automaton has 3653 states and 10193 transitions. Word has length 120 [2021-05-21 15:48:24,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:24,295 INFO L482 AbstractCegarLoop]: Abstraction has 3653 states and 10193 transitions. [2021-05-21 15:48:24,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:24,295 INFO L276 IsEmpty]: Start isEmpty. Operand 3653 states and 10193 transitions. [2021-05-21 15:48:24,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:24,298 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:24,298 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:24,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:24,498 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:24,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:24,499 INFO L82 PathProgramCache]: Analyzing trace with hash -492266652, now seen corresponding path program 162 times [2021-05-21 15:48:24,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:24,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451266586] [2021-05-21 15:48:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:24,657 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:24,657 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:24,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451266586] [2021-05-21 15:48:24,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451266586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:24,657 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412923253] [2021-05-21 15:48:24,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:24,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-21 15:48:24,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:24,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-21 15:48:24,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:24,868 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:24,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412923253] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:24,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:24,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-05-21 15:48:24,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552866325] [2021-05-21 15:48:24,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:24,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:24,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:24,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:24,869 INFO L87 Difference]: Start difference. First operand 3653 states and 10193 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:25,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:25,545 INFO L93 Difference]: Finished difference Result 4721 states and 12532 transitions. [2021-05-21 15:48:25,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:48:25,545 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:25,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:25,549 INFO L225 Difference]: With dead ends: 4721 [2021-05-21 15:48:25,549 INFO L226 Difference]: Without dead ends: 4451 [2021-05-21 15:48:25,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 637.5ms TimeCoverageRelationStatistics Valid=799, Invalid=2623, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:48:25,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4451 states. [2021-05-21 15:48:25,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4451 to 3728. [2021-05-21 15:48:25,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3728 states, 3727 states have (on average 2.795277703246579) internal successors, (10418), 3727 states have internal predecessors, (10418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3728 states to 3728 states and 10418 transitions. [2021-05-21 15:48:25,592 INFO L78 Accepts]: Start accepts. Automaton has 3728 states and 10418 transitions. Word has length 120 [2021-05-21 15:48:25,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:25,593 INFO L482 AbstractCegarLoop]: Abstraction has 3728 states and 10418 transitions. [2021-05-21 15:48:25,593 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:25,593 INFO L276 IsEmpty]: Start isEmpty. Operand 3728 states and 10418 transitions. [2021-05-21 15:48:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:25,596 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:25,596 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:25,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:25,797 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:25,797 INFO L82 PathProgramCache]: Analyzing trace with hash 121972818, now seen corresponding path program 163 times [2021-05-21 15:48:25,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:25,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385686611] [2021-05-21 15:48:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:26,026 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:26,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:26,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385686611] [2021-05-21 15:48:26,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385686611] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:26,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764029318] [2021-05-21 15:48:26,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:26,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:26,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:48:26,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:26,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764029318] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:26,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:26,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:48:26,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132336758] [2021-05-21 15:48:26,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:48:26,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:26,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:48:26,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:48:26,220 INFO L87 Difference]: Start difference. First operand 3728 states and 10418 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:26,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:26,784 INFO L93 Difference]: Finished difference Result 4791 states and 12777 transitions. [2021-05-21 15:48:26,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:48:26,784 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:26,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:26,788 INFO L225 Difference]: With dead ends: 4791 [2021-05-21 15:48:26,789 INFO L226 Difference]: Without dead ends: 4521 [2021-05-21 15:48:26,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 572.1ms TimeCoverageRelationStatistics Valid=921, Invalid=2501, Unknown=0, NotChecked=0, Total=3422 [2021-05-21 15:48:26,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4521 states. [2021-05-21 15:48:26,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4521 to 3803. [2021-05-21 15:48:26,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3803 states, 3802 states have (on average 2.8032614413466597) internal successors, (10658), 3802 states have internal predecessors, (10658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:26,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3803 states to 3803 states and 10658 transitions. [2021-05-21 15:48:26,829 INFO L78 Accepts]: Start accepts. Automaton has 3803 states and 10658 transitions. Word has length 120 [2021-05-21 15:48:26,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:26,829 INFO L482 AbstractCegarLoop]: Abstraction has 3803 states and 10658 transitions. [2021-05-21 15:48:26,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:26,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3803 states and 10658 transitions. [2021-05-21 15:48:26,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:26,832 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:26,832 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:27,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:27,032 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:27,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:27,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1593269470, now seen corresponding path program 164 times [2021-05-21 15:48:27,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:27,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025327445] [2021-05-21 15:48:27,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:27,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:27,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:27,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025327445] [2021-05-21 15:48:27,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025327445] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:27,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853516087] [2021-05-21 15:48:27,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:27,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:48:27,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:27,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:48:27,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:27,398 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:27,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853516087] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:27,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:27,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2021-05-21 15:48:27,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031570284] [2021-05-21 15:48:27,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:27,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:27,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:27,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:27,399 INFO L87 Difference]: Start difference. First operand 3803 states and 10658 transitions. Second operand has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:28,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:28,168 INFO L93 Difference]: Finished difference Result 5369 states and 14403 transitions. [2021-05-21 15:48:28,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:48:28,168 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:28,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:28,173 INFO L225 Difference]: With dead ends: 5369 [2021-05-21 15:48:28,173 INFO L226 Difference]: Without dead ends: 4746 [2021-05-21 15:48:28,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 726.5ms TimeCoverageRelationStatistics Valid=1065, Invalid=3095, Unknown=0, NotChecked=0, Total=4160 [2021-05-21 15:48:28,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4746 states. [2021-05-21 15:48:28,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4746 to 3878. [2021-05-21 15:48:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3878 states, 3877 states have (on average 2.8083569770441064) internal successors, (10888), 3877 states have internal predecessors, (10888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:28,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3878 states to 3878 states and 10888 transitions. [2021-05-21 15:48:28,210 INFO L78 Accepts]: Start accepts. Automaton has 3878 states and 10888 transitions. Word has length 120 [2021-05-21 15:48:28,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:28,211 INFO L482 AbstractCegarLoop]: Abstraction has 3878 states and 10888 transitions. [2021-05-21 15:48:28,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 4.96) internal successors, (124), 25 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:28,211 INFO L276 IsEmpty]: Start isEmpty. Operand 3878 states and 10888 transitions. [2021-05-21 15:48:28,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:28,213 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:28,213 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:28,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2021-05-21 15:48:28,414 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:28,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:28,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1669050224, now seen corresponding path program 165 times [2021-05-21 15:48:28,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:28,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103165835] [2021-05-21 15:48:28,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:28,552 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:28,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:28,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103165835] [2021-05-21 15:48:28,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103165835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:28,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476534647] [2021-05-21 15:48:28,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:28,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-21 15:48:28,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:28,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:48:28,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:28,748 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:28,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476534647] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:28,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:28,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:48:28,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778627160] [2021-05-21 15:48:28,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:48:28,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:28,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:48:28,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:48:28,749 INFO L87 Difference]: Start difference. First operand 3878 states and 10888 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:29,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:29,357 INFO L93 Difference]: Finished difference Result 5598 states and 15121 transitions. [2021-05-21 15:48:29,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:48:29,358 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:29,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:29,362 INFO L225 Difference]: With dead ends: 5598 [2021-05-21 15:48:29,362 INFO L226 Difference]: Without dead ends: 5328 [2021-05-21 15:48:29,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 563.3ms TimeCoverageRelationStatistics Valid=1040, Invalid=2620, Unknown=0, NotChecked=0, Total=3660 [2021-05-21 15:48:29,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-05-21 15:48:29,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4058. [2021-05-21 15:48:29,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4058 states, 4057 states have (on average 2.82154301207789) internal successors, (11447), 4057 states have internal predecessors, (11447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:29,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4058 states to 4058 states and 11447 transitions. [2021-05-21 15:48:29,403 INFO L78 Accepts]: Start accepts. Automaton has 4058 states and 11447 transitions. Word has length 120 [2021-05-21 15:48:29,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:29,404 INFO L482 AbstractCegarLoop]: Abstraction has 4058 states and 11447 transitions. [2021-05-21 15:48:29,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:29,404 INFO L276 IsEmpty]: Start isEmpty. Operand 4058 states and 11447 transitions. [2021-05-21 15:48:29,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-21 15:48:29,406 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:29,406 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:29,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-05-21 15:48:29,607 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:29,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:29,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1691393474, now seen corresponding path program 166 times [2021-05-21 15:48:29,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:29,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25039826] [2021-05-21 15:48:29,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:29,754 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:29,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:29,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25039826] [2021-05-21 15:48:29,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25039826] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:29,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922725191] [2021-05-21 15:48:29,754 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:29,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:48:29,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:29,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 15:48:29,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 312 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:29,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922725191] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:29,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:29,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-05-21 15:48:29,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277279565] [2021-05-21 15:48:29,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 15:48:29,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:29,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 15:48:29,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2021-05-21 15:48:29,946 INFO L87 Difference]: Start difference. First operand 4058 states and 11447 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:30,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:30,687 INFO L93 Difference]: Finished difference Result 5085 states and 13821 transitions. [2021-05-21 15:48:30,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:48:30,688 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2021-05-21 15:48:30,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:30,692 INFO L225 Difference]: With dead ends: 5085 [2021-05-21 15:48:30,692 INFO L226 Difference]: Without dead ends: 4506 [2021-05-21 15:48:30,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 714.0ms TimeCoverageRelationStatistics Valid=1146, Invalid=2886, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 15:48:30,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4506 states. [2021-05-21 15:48:30,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4506 to 2713. [2021-05-21 15:48:30,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2713 states, 2712 states have (on average 2.7389380530973453) internal successors, (7428), 2712 states have internal predecessors, (7428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:30,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2713 states to 2713 states and 7428 transitions. [2021-05-21 15:48:30,722 INFO L78 Accepts]: Start accepts. Automaton has 2713 states and 7428 transitions. Word has length 120 [2021-05-21 15:48:30,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:30,722 INFO L482 AbstractCegarLoop]: Abstraction has 2713 states and 7428 transitions. [2021-05-21 15:48:30,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:30,722 INFO L276 IsEmpty]: Start isEmpty. Operand 2713 states and 7428 transitions. [2021-05-21 15:48:30,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:30,724 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:30,724 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:30,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-05-21 15:48:30,925 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:30,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:30,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1352458403, now seen corresponding path program 167 times [2021-05-21 15:48:30,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:30,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260433443] [2021-05-21 15:48:30,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:31,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:31,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260433443] [2021-05-21 15:48:31,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260433443] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:31,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492594050] [2021-05-21 15:48:31,136 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:31,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 15:48:31,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:31,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:48:31,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:31,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492594050] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:31,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:31,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:48:31,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063638753] [2021-05-21 15:48:31,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:31,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:31,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:31,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:31,346 INFO L87 Difference]: Start difference. First operand 2713 states and 7428 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:31,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:31,713 INFO L93 Difference]: Finished difference Result 4031 states and 10267 transitions. [2021-05-21 15:48:31,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-21 15:48:31,714 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:31,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:31,717 INFO L225 Difference]: With dead ends: 4031 [2021-05-21 15:48:31,717 INFO L226 Difference]: Without dead ends: 3761 [2021-05-21 15:48:31,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 451.3ms TimeCoverageRelationStatistics Valid=610, Invalid=1742, Unknown=0, NotChecked=0, Total=2352 [2021-05-21 15:48:31,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-05-21 15:48:31,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 2788. [2021-05-21 15:48:31,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2788 states, 2787 states have (on average 2.7459634015069967) internal successors, (7653), 2787 states have internal predecessors, (7653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:31,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2788 states to 2788 states and 7653 transitions. [2021-05-21 15:48:31,746 INFO L78 Accepts]: Start accepts. Automaton has 2788 states and 7653 transitions. Word has length 125 [2021-05-21 15:48:31,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:31,746 INFO L482 AbstractCegarLoop]: Abstraction has 2788 states and 7653 transitions. [2021-05-21 15:48:31,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:31,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2788 states and 7653 transitions. [2021-05-21 15:48:31,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:31,748 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:31,748 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:31,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:31,949 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:31,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:31,949 INFO L82 PathProgramCache]: Analyzing trace with hash 2043985453, now seen corresponding path program 168 times [2021-05-21 15:48:31,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:31,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875216077] [2021-05-21 15:48:31,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:32,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:32,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875216077] [2021-05-21 15:48:32,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875216077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:32,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062362854] [2021-05-21 15:48:32,153 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:32,214 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-21 15:48:32,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:32,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:48:32,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:32,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062362854] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:32,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:32,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-05-21 15:48:32,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545257267] [2021-05-21 15:48:32,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:48:32,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:32,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:48:32,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:48:32,378 INFO L87 Difference]: Start difference. First operand 2788 states and 7653 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:32,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:32,810 INFO L93 Difference]: Finished difference Result 4501 states and 11282 transitions. [2021-05-21 15:48:32,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-21 15:48:32,811 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:32,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:32,814 INFO L225 Difference]: With dead ends: 4501 [2021-05-21 15:48:32,814 INFO L226 Difference]: Without dead ends: 4231 [2021-05-21 15:48:32,814 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 499.9ms TimeCoverageRelationStatistics Valid=665, Invalid=1987, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 15:48:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4231 states. [2021-05-21 15:48:32,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4231 to 2863. [2021-05-21 15:48:32,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 2.752620545073375) internal successors, (7878), 2862 states have internal predecessors, (7878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:32,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 7878 transitions. [2021-05-21 15:48:32,840 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 7878 transitions. Word has length 125 [2021-05-21 15:48:32,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:32,840 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 7878 transitions. [2021-05-21 15:48:32,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:32,841 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 7878 transitions. [2021-05-21 15:48:32,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:32,842 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:32,842 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:33,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:33,043 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:33,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:33,043 INFO L82 PathProgramCache]: Analyzing trace with hash 429031963, now seen corresponding path program 169 times [2021-05-21 15:48:33,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:33,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494272143] [2021-05-21 15:48:33,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:33,226 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:33,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:33,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494272143] [2021-05-21 15:48:33,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494272143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:33,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813242722] [2021-05-21 15:48:33,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:33,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:33,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:48:33,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:33,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813242722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:33,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:33,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:48:33,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099659267] [2021-05-21 15:48:33,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:33,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:33,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:33,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:33,431 INFO L87 Difference]: Start difference. First operand 2863 states and 7878 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:33,831 INFO L93 Difference]: Finished difference Result 4531 states and 11417 transitions. [2021-05-21 15:48:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-21 15:48:33,832 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:33,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:33,836 INFO L225 Difference]: With dead ends: 4531 [2021-05-21 15:48:33,836 INFO L226 Difference]: Without dead ends: 4261 [2021-05-21 15:48:33,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 453.8ms TimeCoverageRelationStatistics Valid=663, Invalid=1989, Unknown=0, NotChecked=0, Total=2652 [2021-05-21 15:48:33,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-05-21 15:48:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 2938. [2021-05-21 15:48:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 2.758937691521961) internal successors, (8103), 2937 states have internal predecessors, (8103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:33,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 8103 transitions. [2021-05-21 15:48:33,869 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 8103 transitions. Word has length 125 [2021-05-21 15:48:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:33,869 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 8103 transitions. [2021-05-21 15:48:33,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:33,870 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 8103 transitions. [2021-05-21 15:48:33,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:33,871 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:33,872 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:34,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:34,072 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:34,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:34,072 INFO L82 PathProgramCache]: Analyzing trace with hash 48588011, now seen corresponding path program 170 times [2021-05-21 15:48:34,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:34,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213955286] [2021-05-21 15:48:34,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:34,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:34,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213955286] [2021-05-21 15:48:34,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213955286] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:34,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677240143] [2021-05-21 15:48:34,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:34,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:48:34,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:34,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:48:34,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:34,486 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:34,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677240143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:34,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:34,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-05-21 15:48:34,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069125001] [2021-05-21 15:48:34,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:48:34,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:34,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:48:34,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:48:34,487 INFO L87 Difference]: Start difference. First operand 2938 states and 8103 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:34,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:34,977 INFO L93 Difference]: Finished difference Result 4556 states and 11542 transitions. [2021-05-21 15:48:34,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-21 15:48:34,978 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:34,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:34,982 INFO L225 Difference]: With dead ends: 4556 [2021-05-21 15:48:34,982 INFO L226 Difference]: Without dead ends: 4286 [2021-05-21 15:48:34,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 537.1ms TimeCoverageRelationStatistics Valid=686, Invalid=2176, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 15:48:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-05-21 15:48:35,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 3013. [2021-05-21 15:48:35,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3013 states, 3012 states have (on average 2.764940239043825) internal successors, (8328), 3012 states have internal predecessors, (8328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:35,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3013 states to 3013 states and 8328 transitions. [2021-05-21 15:48:35,017 INFO L78 Accepts]: Start accepts. Automaton has 3013 states and 8328 transitions. Word has length 125 [2021-05-21 15:48:35,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:35,017 INFO L482 AbstractCegarLoop]: Abstraction has 3013 states and 8328 transitions. [2021-05-21 15:48:35,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:35,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3013 states and 8328 transitions. [2021-05-21 15:48:35,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:35,019 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:35,020 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:35,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-05-21 15:48:35,233 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:35,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:35,233 INFO L82 PathProgramCache]: Analyzing trace with hash 672963161, now seen corresponding path program 171 times [2021-05-21 15:48:35,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:35,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178467348] [2021-05-21 15:48:35,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:35,402 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:35,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:35,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178467348] [2021-05-21 15:48:35,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178467348] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:35,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161993023] [2021-05-21 15:48:35,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:35,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-21 15:48:35,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:35,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-21 15:48:35,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:35,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161993023] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:35,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:35,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:48:35,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440195599] [2021-05-21 15:48:35,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:35,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:35,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:35,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:35,636 INFO L87 Difference]: Start difference. First operand 3013 states and 8328 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:36,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:36,076 INFO L93 Difference]: Finished difference Result 4581 states and 11667 transitions. [2021-05-21 15:48:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-21 15:48:36,076 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:36,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:36,081 INFO L225 Difference]: With dead ends: 4581 [2021-05-21 15:48:36,081 INFO L226 Difference]: Without dead ends: 4311 [2021-05-21 15:48:36,081 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=698, Invalid=2164, Unknown=0, NotChecked=0, Total=2862 [2021-05-21 15:48:36,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4311 states. [2021-05-21 15:48:36,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4311 to 3088. [2021-05-21 15:48:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3088 states, 3087 states have (on average 2.770651117589893) internal successors, (8553), 3087 states have internal predecessors, (8553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:36,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3088 states to 3088 states and 8553 transitions. [2021-05-21 15:48:36,119 INFO L78 Accepts]: Start accepts. Automaton has 3088 states and 8553 transitions. Word has length 125 [2021-05-21 15:48:36,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:36,119 INFO L482 AbstractCegarLoop]: Abstraction has 3088 states and 8553 transitions. [2021-05-21 15:48:36,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:36,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3088 states and 8553 transitions. [2021-05-21 15:48:36,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:36,122 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:36,122 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:36,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-05-21 15:48:36,322 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:36,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:36,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1482015017, now seen corresponding path program 172 times [2021-05-21 15:48:36,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:36,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708823418] [2021-05-21 15:48:36,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:36,509 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:36,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:36,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708823418] [2021-05-21 15:48:36,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708823418] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:36,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979565328] [2021-05-21 15:48:36,509 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:36,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:48:36,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:36,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:48:36,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:36,745 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:36,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979565328] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:36,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:36,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-05-21 15:48:36,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545204301] [2021-05-21 15:48:36,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:48:36,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:36,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:48:36,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:48:36,746 INFO L87 Difference]: Start difference. First operand 3088 states and 8553 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:37,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:37,297 INFO L93 Difference]: Finished difference Result 4606 states and 11792 transitions. [2021-05-21 15:48:37,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-21 15:48:37,298 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:37,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:37,302 INFO L225 Difference]: With dead ends: 4606 [2021-05-21 15:48:37,302 INFO L226 Difference]: Without dead ends: 4336 [2021-05-21 15:48:37,302 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 585.3ms TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 15:48:37,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2021-05-21 15:48:37,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 3163. [2021-05-21 15:48:37,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3163 states, 3162 states have (on average 2.7760910815939277) internal successors, (8778), 3162 states have internal predecessors, (8778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3163 states to 3163 states and 8778 transitions. [2021-05-21 15:48:37,340 INFO L78 Accepts]: Start accepts. Automaton has 3163 states and 8778 transitions. Word has length 125 [2021-05-21 15:48:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:37,341 INFO L482 AbstractCegarLoop]: Abstraction has 3163 states and 8778 transitions. [2021-05-21 15:48:37,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3163 states and 8778 transitions. [2021-05-21 15:48:37,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:37,343 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:37,343 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:37,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:37,543 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:37,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:37,544 INFO L82 PathProgramCache]: Analyzing trace with hash 90064919, now seen corresponding path program 173 times [2021-05-21 15:48:37,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:37,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831406853] [2021-05-21 15:48:37,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:37,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:37,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831406853] [2021-05-21 15:48:37,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831406853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:37,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669609608] [2021-05-21 15:48:37,716 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:37,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 15:48:37,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:37,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:48:37,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:37,923 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:37,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669609608] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:37,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:37,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:48:37,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388813979] [2021-05-21 15:48:37,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:37,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:37,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:37,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:37,924 INFO L87 Difference]: Start difference. First operand 3163 states and 8778 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:38,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:38,436 INFO L93 Difference]: Finished difference Result 4631 states and 11917 transitions. [2021-05-21 15:48:38,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-21 15:48:38,436 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:38,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:38,439 INFO L225 Difference]: With dead ends: 4631 [2021-05-21 15:48:38,440 INFO L226 Difference]: Without dead ends: 4361 [2021-05-21 15:48:38,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 519.9ms TimeCoverageRelationStatistics Valid=749, Invalid=2331, Unknown=0, NotChecked=0, Total=3080 [2021-05-21 15:48:38,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4361 states. [2021-05-21 15:48:38,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4361 to 3238. [2021-05-21 15:48:38,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3238 states, 3237 states have (on average 2.7812789620018536) internal successors, (9003), 3237 states have internal predecessors, (9003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3238 states to 3238 states and 9003 transitions. [2021-05-21 15:48:38,474 INFO L78 Accepts]: Start accepts. Automaton has 3238 states and 9003 transitions. Word has length 125 [2021-05-21 15:48:38,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:38,474 INFO L482 AbstractCegarLoop]: Abstraction has 3238 states and 9003 transitions. [2021-05-21 15:48:38,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:38,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3238 states and 9003 transitions. [2021-05-21 15:48:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:38,476 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:38,476 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:38,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:38,677 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:38,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:38,677 INFO L82 PathProgramCache]: Analyzing trace with hash -155012377, now seen corresponding path program 174 times [2021-05-21 15:48:38,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:38,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922656074] [2021-05-21 15:48:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:38,892 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:38,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922656074] [2021-05-21 15:48:38,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922656074] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:38,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078549450] [2021-05-21 15:48:38,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:38,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-21 15:48:38,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:38,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:48:38,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:39,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078549450] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:39,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:39,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-05-21 15:48:39,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365166394] [2021-05-21 15:48:39,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:48:39,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:39,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:48:39,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:48:39,135 INFO L87 Difference]: Start difference. First operand 3238 states and 9003 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:39,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:39,716 INFO L93 Difference]: Finished difference Result 4656 states and 12042 transitions. [2021-05-21 15:48:39,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-21 15:48:39,716 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:39,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:39,720 INFO L225 Difference]: With dead ends: 4656 [2021-05-21 15:48:39,721 INFO L226 Difference]: Without dead ends: 4386 [2021-05-21 15:48:39,721 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 619.7ms TimeCoverageRelationStatistics Valid=776, Invalid=2530, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 15:48:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4386 states. [2021-05-21 15:48:39,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4386 to 3313. [2021-05-21 15:48:39,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3313 states, 3312 states have (on average 2.786231884057971) internal successors, (9228), 3312 states have internal predecessors, (9228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:39,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3313 states to 3313 states and 9228 transitions. [2021-05-21 15:48:39,758 INFO L78 Accepts]: Start accepts. Automaton has 3313 states and 9228 transitions. Word has length 125 [2021-05-21 15:48:39,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:39,758 INFO L482 AbstractCegarLoop]: Abstraction has 3313 states and 9228 transitions. [2021-05-21 15:48:39,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:39,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3313 states and 9228 transitions. [2021-05-21 15:48:39,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:39,760 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:39,760 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:39,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:39,961 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:39,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:39,961 INFO L82 PathProgramCache]: Analyzing trace with hash -531862699, now seen corresponding path program 175 times [2021-05-21 15:48:39,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:39,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139552130] [2021-05-21 15:48:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:39,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:40,118 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:40,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:40,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139552130] [2021-05-21 15:48:40,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139552130] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:40,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167727218] [2021-05-21 15:48:40,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:40,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:48:40,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:40,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167727218] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:40,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:40,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:48:40,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526267848] [2021-05-21 15:48:40,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:40,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:40,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:40,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:40,330 INFO L87 Difference]: Start difference. First operand 3313 states and 9228 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:40,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:40,835 INFO L93 Difference]: Finished difference Result 4681 states and 12167 transitions. [2021-05-21 15:48:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-21 15:48:40,836 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:40,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:40,840 INFO L225 Difference]: With dead ends: 4681 [2021-05-21 15:48:40,840 INFO L226 Difference]: Without dead ends: 4411 [2021-05-21 15:48:40,840 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 491.7ms TimeCoverageRelationStatistics Valid=816, Invalid=2490, Unknown=0, NotChecked=0, Total=3306 [2021-05-21 15:48:40,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4411 states. [2021-05-21 15:48:40,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4411 to 3388. [2021-05-21 15:48:40,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 2.7909654561558903) internal successors, (9453), 3387 states have internal predecessors, (9453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 9453 transitions. [2021-05-21 15:48:40,879 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 9453 transitions. Word has length 125 [2021-05-21 15:48:40,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:40,879 INFO L482 AbstractCegarLoop]: Abstraction has 3388 states and 9453 transitions. [2021-05-21 15:48:40,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:40,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 9453 transitions. [2021-05-21 15:48:40,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:40,881 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:40,881 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:41,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:41,082 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:41,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:41,082 INFO L82 PathProgramCache]: Analyzing trace with hash 794892837, now seen corresponding path program 176 times [2021-05-21 15:48:41,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:41,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373073146] [2021-05-21 15:48:41,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:41,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:41,259 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:41,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:41,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373073146] [2021-05-21 15:48:41,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373073146] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:41,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184304815] [2021-05-21 15:48:41,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:41,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:48:41,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:41,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:48:41,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:41,477 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:41,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184304815] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:41,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:41,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-05-21 15:48:41,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820066411] [2021-05-21 15:48:41,479 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:48:41,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:41,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:48:41,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:48:41,479 INFO L87 Difference]: Start difference. First operand 3388 states and 9453 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:42,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:42,111 INFO L93 Difference]: Finished difference Result 4706 states and 12292 transitions. [2021-05-21 15:48:42,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-21 15:48:42,111 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:42,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:42,114 INFO L225 Difference]: With dead ends: 4706 [2021-05-21 15:48:42,114 INFO L226 Difference]: Without dead ends: 4436 [2021-05-21 15:48:42,114 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 829 ImplicationChecksByTransitivity, 632.0ms TimeCoverageRelationStatistics Valid=845, Invalid=2695, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 15:48:42,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4436 states. [2021-05-21 15:48:42,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4436 to 3463. [2021-05-21 15:48:42,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3463 states, 3462 states have (on average 2.7954939341421143) internal successors, (9678), 3462 states have internal predecessors, (9678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:42,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3463 states to 3463 states and 9678 transitions. [2021-05-21 15:48:42,151 INFO L78 Accepts]: Start accepts. Automaton has 3463 states and 9678 transitions. Word has length 125 [2021-05-21 15:48:42,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:42,151 INFO L482 AbstractCegarLoop]: Abstraction has 3463 states and 9678 transitions. [2021-05-21 15:48:42,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:42,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3463 states and 9678 transitions. [2021-05-21 15:48:42,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:42,153 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:42,153 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:42,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-05-21 15:48:42,354 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:42,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:42,354 INFO L82 PathProgramCache]: Analyzing trace with hash 1249109011, now seen corresponding path program 177 times [2021-05-21 15:48:42,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:42,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121109403] [2021-05-21 15:48:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:42,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:42,508 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:42,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:42,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121109403] [2021-05-21 15:48:42,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121109403] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:42,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442223265] [2021-05-21 15:48:42,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:42,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-21 15:48:42,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:42,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-21 15:48:42,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:42,708 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:42,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442223265] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:42,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:42,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:48:42,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216876810] [2021-05-21 15:48:42,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:42,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:42,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:42,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=500, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:42,709 INFO L87 Difference]: Start difference. First operand 3463 states and 9678 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:43,245 INFO L93 Difference]: Finished difference Result 4731 states and 12417 transitions. [2021-05-21 15:48:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-21 15:48:43,245 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:43,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:43,249 INFO L225 Difference]: With dead ends: 4731 [2021-05-21 15:48:43,250 INFO L226 Difference]: Without dead ends: 4461 [2021-05-21 15:48:43,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 521.6ms TimeCoverageRelationStatistics Valid=899, Invalid=2641, Unknown=0, NotChecked=0, Total=3540 [2021-05-21 15:48:43,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4461 states. [2021-05-21 15:48:43,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4461 to 3538. [2021-05-21 15:48:43,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3537 states have (on average 2.799830364715861) internal successors, (9903), 3537 states have internal predecessors, (9903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:43,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 9903 transitions. [2021-05-21 15:48:43,288 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 9903 transitions. Word has length 125 [2021-05-21 15:48:43,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:43,288 INFO L482 AbstractCegarLoop]: Abstraction has 3538 states and 9903 transitions. [2021-05-21 15:48:43,288 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 9903 transitions. [2021-05-21 15:48:43,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:43,291 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:43,291 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:43,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:43,491 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:43,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:43,492 INFO L82 PathProgramCache]: Analyzing trace with hash -2046961949, now seen corresponding path program 178 times [2021-05-21 15:48:43,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:43,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960182436] [2021-05-21 15:48:43,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:43,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:43,661 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:43,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:43,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960182436] [2021-05-21 15:48:43,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960182436] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:43,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774204722] [2021-05-21 15:48:43,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:43,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:48:43,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:43,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:48:43,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:43,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774204722] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:43,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:43,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-05-21 15:48:43,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402500747] [2021-05-21 15:48:43,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:48:43,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:43,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:48:43,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=550, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:48:43,891 INFO L87 Difference]: Start difference. First operand 3538 states and 9903 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:44,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:44,583 INFO L93 Difference]: Finished difference Result 4756 states and 12542 transitions. [2021-05-21 15:48:44,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-21 15:48:44,583 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:44,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:44,587 INFO L225 Difference]: With dead ends: 4756 [2021-05-21 15:48:44,587 INFO L226 Difference]: Without dead ends: 4486 [2021-05-21 15:48:44,588 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 666.4ms TimeCoverageRelationStatistics Valid=930, Invalid=2852, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 15:48:44,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4486 states. [2021-05-21 15:48:44,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4486 to 3613. [2021-05-21 15:48:44,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 2.8039867109634553) internal successors, (10128), 3612 states have internal predecessors, (10128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:44,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 10128 transitions. [2021-05-21 15:48:44,630 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 10128 transitions. Word has length 125 [2021-05-21 15:48:44,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:44,630 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 10128 transitions. [2021-05-21 15:48:44,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:44,630 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 10128 transitions. [2021-05-21 15:48:44,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:44,633 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:44,633 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:44,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-05-21 15:48:44,833 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:44,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:44,834 INFO L82 PathProgramCache]: Analyzing trace with hash 368677457, now seen corresponding path program 179 times [2021-05-21 15:48:44,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:44,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341590658] [2021-05-21 15:48:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:44,984 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:44,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:44,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341590658] [2021-05-21 15:48:44,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341590658] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:44,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590877643] [2021-05-21 15:48:44,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:45,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-05-21 15:48:45,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:45,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:48:45,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:45,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590877643] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:45,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:45,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:48:45,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142944840] [2021-05-21 15:48:45,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:45,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:45,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:45,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:45,192 INFO L87 Difference]: Start difference. First operand 3613 states and 10128 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:45,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:45,778 INFO L93 Difference]: Finished difference Result 4781 states and 12667 transitions. [2021-05-21 15:48:45,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-21 15:48:45,778 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:45,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:45,783 INFO L225 Difference]: With dead ends: 4781 [2021-05-21 15:48:45,783 INFO L226 Difference]: Without dead ends: 4511 [2021-05-21 15:48:45,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 996 ImplicationChecksByTransitivity, 551.4ms TimeCoverageRelationStatistics Valid=998, Invalid=2784, Unknown=0, NotChecked=0, Total=3782 [2021-05-21 15:48:45,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-05-21 15:48:45,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3688. [2021-05-21 15:48:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3688 states, 3687 states have (on average 2.807973962571196) internal successors, (10353), 3687 states have internal predecessors, (10353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:45,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3688 states to 3688 states and 10353 transitions. [2021-05-21 15:48:45,822 INFO L78 Accepts]: Start accepts. Automaton has 3688 states and 10353 transitions. Word has length 125 [2021-05-21 15:48:45,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:45,822 INFO L482 AbstractCegarLoop]: Abstraction has 3688 states and 10353 transitions. [2021-05-21 15:48:45,822 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand 3688 states and 10353 transitions. [2021-05-21 15:48:45,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:45,825 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:45,825 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:46,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:46,025 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:46,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:46,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1895970527, now seen corresponding path program 180 times [2021-05-21 15:48:46,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:46,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363219483] [2021-05-21 15:48:46,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:46,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:46,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363219483] [2021-05-21 15:48:46,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363219483] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:46,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640412188] [2021-05-21 15:48:46,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:46,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-05-21 15:48:46,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:46,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-21 15:48:46,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:46,408 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:46,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640412188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:46,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:46,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-05-21 15:48:46,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666744635] [2021-05-21 15:48:46,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:48:46,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:46,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:48:46,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:48:46,409 INFO L87 Difference]: Start difference. First operand 3688 states and 10353 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:47,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:47,140 INFO L93 Difference]: Finished difference Result 4806 states and 12792 transitions. [2021-05-21 15:48:47,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-21 15:48:47,141 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:47,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:47,145 INFO L225 Difference]: With dead ends: 4806 [2021-05-21 15:48:47,145 INFO L226 Difference]: Without dead ends: 4536 [2021-05-21 15:48:47,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 690.3ms TimeCoverageRelationStatistics Valid=965, Invalid=3067, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 15:48:47,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-05-21 15:48:47,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3763. [2021-05-21 15:48:47,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3763 states, 3762 states have (on average 2.8118022328548644) internal successors, (10578), 3762 states have internal predecessors, (10578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:47,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3763 states to 3763 states and 10578 transitions. [2021-05-21 15:48:47,191 INFO L78 Accepts]: Start accepts. Automaton has 3763 states and 10578 transitions. Word has length 125 [2021-05-21 15:48:47,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:47,191 INFO L482 AbstractCegarLoop]: Abstraction has 3763 states and 10578 transitions. [2021-05-21 15:48:47,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:47,191 INFO L276 IsEmpty]: Start isEmpty. Operand 3763 states and 10578 transitions. [2021-05-21 15:48:47,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:47,194 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:47,194 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:47,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable192 [2021-05-21 15:48:47,409 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:47,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:47,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1281731057, now seen corresponding path program 181 times [2021-05-21 15:48:47,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:47,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879832064] [2021-05-21 15:48:47,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:47,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:47,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:47,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879832064] [2021-05-21 15:48:47,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879832064] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:47,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885387890] [2021-05-21 15:48:47,570 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:47,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:47,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:48:47,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:47,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885387890] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:47,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:47,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:48:47,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565908982] [2021-05-21 15:48:47,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:47,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:47,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:47,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:47,780 INFO L87 Difference]: Start difference. First operand 3763 states and 10578 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:48,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:48,395 INFO L93 Difference]: Finished difference Result 4831 states and 12917 transitions. [2021-05-21 15:48:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-21 15:48:48,396 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:48,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:48,400 INFO L225 Difference]: With dead ends: 4831 [2021-05-21 15:48:48,401 INFO L226 Difference]: Without dead ends: 4561 [2021-05-21 15:48:48,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1098 ImplicationChecksByTransitivity, 583.6ms TimeCoverageRelationStatistics Valid=1113, Invalid=2919, Unknown=0, NotChecked=0, Total=4032 [2021-05-21 15:48:48,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-05-21 15:48:48,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3838. [2021-05-21 15:48:48,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.815480844409695) internal successors, (10803), 3837 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:48,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 10803 transitions. [2021-05-21 15:48:48,449 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 10803 transitions. Word has length 125 [2021-05-21 15:48:48,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:48,449 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 10803 transitions. [2021-05-21 15:48:48,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:48,450 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 10803 transitions. [2021-05-21 15:48:48,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:48,453 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:48,453 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:48,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:48,665 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:48,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:48,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1297993951, now seen corresponding path program 182 times [2021-05-21 15:48:48,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:48,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611270289] [2021-05-21 15:48:48,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:48,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:48,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:48,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611270289] [2021-05-21 15:48:48,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611270289] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:48,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587875668] [2021-05-21 15:48:48,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:48,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 15:48:48,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:48,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:48:48,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:49,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587875668] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:49,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:49,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2021-05-21 15:48:49,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289039849] [2021-05-21 15:48:49,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-21 15:48:49,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:49,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-21 15:48:49,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2021-05-21 15:48:49,032 INFO L87 Difference]: Start difference. First operand 3838 states and 10803 transitions. Second operand has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:49,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:49,816 INFO L93 Difference]: Finished difference Result 4916 states and 13207 transitions. [2021-05-21 15:48:49,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-21 15:48:49,816 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:49,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:49,820 INFO L225 Difference]: With dead ends: 4916 [2021-05-21 15:48:49,820 INFO L226 Difference]: Without dead ends: 4646 [2021-05-21 15:48:49,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 747.3ms TimeCoverageRelationStatistics Valid=1148, Invalid=3142, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 15:48:49,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4646 states. [2021-05-21 15:48:49,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4646 to 3913. [2021-05-21 15:48:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 2.8241308793456033) internal successors, (11048), 3912 states have internal predecessors, (11048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:49,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 11048 transitions. [2021-05-21 15:48:49,860 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 11048 transitions. Word has length 125 [2021-05-21 15:48:49,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:49,861 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 11048 transitions. [2021-05-21 15:48:49,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.961538461538462) internal successors, (129), 26 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:49,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 11048 transitions. [2021-05-21 15:48:49,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:49,863 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:49,863 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:50,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:50,064 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:50,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:50,064 INFO L82 PathProgramCache]: Analyzing trace with hash 265346349, now seen corresponding path program 183 times [2021-05-21 15:48:50,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:50,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003187313] [2021-05-21 15:48:50,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:50,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:50,223 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:50,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:50,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003187313] [2021-05-21 15:48:50,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003187313] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:50,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887816121] [2021-05-21 15:48:50,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:50,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-21 15:48:50,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:50,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 15:48:50,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:50,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887816121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:50,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:50,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:48:50,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158736950] [2021-05-21 15:48:50,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:50,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:50,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:50,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:50,433 INFO L87 Difference]: Start difference. First operand 3913 states and 11048 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:51,088 INFO L93 Difference]: Finished difference Result 5658 states and 15331 transitions. [2021-05-21 15:48:51,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:48:51,088 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:51,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:51,094 INFO L225 Difference]: With dead ends: 5658 [2021-05-21 15:48:51,094 INFO L226 Difference]: Without dead ends: 5388 [2021-05-21 15:48:51,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 609.2ms TimeCoverageRelationStatistics Valid=1245, Invalid=3045, Unknown=0, NotChecked=0, Total=4290 [2021-05-21 15:48:51,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5388 states. [2021-05-21 15:48:51,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5388 to 4093. [2021-05-21 15:48:51,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 2.8365102639296187) internal successors, (11607), 4092 states have internal predecessors, (11607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:51,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 11607 transitions. [2021-05-21 15:48:51,151 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 11607 transitions. Word has length 125 [2021-05-21 15:48:51,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:51,151 INFO L482 AbstractCegarLoop]: Abstraction has 4093 states and 11607 transitions. [2021-05-21 15:48:51,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:51,151 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 11607 transitions. [2021-05-21 15:48:51,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-05-21 15:48:51,154 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:51,154 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:51,354 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:51,355 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:51,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:51,355 INFO L82 PathProgramCache]: Analyzing trace with hash 287689599, now seen corresponding path program 184 times [2021-05-21 15:48:51,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:51,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634871425] [2021-05-21 15:48:51,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:51,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 15:48:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:51,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 15:48:51,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634871425] [2021-05-21 15:48:51,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634871425] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:51,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939175431] [2021-05-21 15:48:51,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:51,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 15:48:51,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 15:48:51,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-21 15:48:51,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 15:48:51,715 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 15:48:51,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939175431] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 15:48:51,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 15:48:51,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-05-21 15:48:51,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321970005] [2021-05-21 15:48:51,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-21 15:48:51,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 15:48:51,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-21 15:48:51,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2021-05-21 15:48:51,716 INFO L87 Difference]: Start difference. First operand 4093 states and 11607 transitions. Second operand has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:52,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 15:48:52,495 INFO L93 Difference]: Finished difference Result 5120 states and 13981 transitions. [2021-05-21 15:48:52,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-21 15:48:52,495 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-05-21 15:48:52,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 15:48:52,500 INFO L225 Difference]: With dead ends: 5120 [2021-05-21 15:48:52,501 INFO L226 Difference]: Without dead ends: 4631 [2021-05-21 15:48:52,501 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 749.7ms TimeCoverageRelationStatistics Valid=1258, Invalid=3164, Unknown=0, NotChecked=0, Total=4422 [2021-05-21 15:48:52,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4631 states. [2021-05-21 15:48:52,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4631 to 2634. [2021-05-21 15:48:52,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2634 states, 2633 states have (on average 2.7406000759589824) internal successors, (7216), 2633 states have internal predecessors, (7216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2634 states to 2634 states and 7216 transitions. [2021-05-21 15:48:52,536 INFO L78 Accepts]: Start accepts. Automaton has 2634 states and 7216 transitions. Word has length 125 [2021-05-21 15:48:52,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 15:48:52,536 INFO L482 AbstractCegarLoop]: Abstraction has 2634 states and 7216 transitions. [2021-05-21 15:48:52,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 5.08) internal successors, (127), 25 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 15:48:52,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2634 states and 7216 transitions. [2021-05-21 15:48:52,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-21 15:48:52,538 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 15:48:52,539 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 15:48:52,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 15:48:52,739 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-21 15:48:52,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 15:48:52,739 INFO L82 PathProgramCache]: Analyzing trace with hash -325106707, now seen corresponding path program 185 times [2021-05-21 15:48:52,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 15:48:52,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874713760] [2021-05-21 15:48:52,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 15:48:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 15:48:52,746 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 15:48:52,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-21 15:48:52,753 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-21 15:48:52,787 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-21 15:48:52,788 INFO L622 BasicCegarLoop]: Counterexample might be feasible [2021-05-21 15:48:52,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2021-05-21 15:48:52,790 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-05-21 15:48:52,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.05 03:48:52 BasicIcfg [2021-05-21 15:48:52,885 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-21 15:48:52,886 INFO L168 Benchmark]: Toolchain (without parser) took 178453.59 ms. Allocated memory was 402.7 MB in the beginning and 901.8 MB in the end (delta: 499.1 MB). Free memory was 364.4 MB in the beginning and 410.9 MB in the end (delta: -46.5 MB). Peak memory consumption was 454.8 MB. Max. memory is 16.0 GB. [2021-05-21 15:48:52,886 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 402.7 MB. Free memory was 383.0 MB in the beginning and 382.9 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 15:48:52,886 INFO L168 Benchmark]: CACSL2BoogieTranslator took 409.67 ms. Allocated memory is still 402.7 MB. Free memory was 364.2 MB in the beginning and 366.7 MB in the end (delta: -2.4 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.0 GB. [2021-05-21 15:48:52,886 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.39 ms. Allocated memory is still 402.7 MB. Free memory was 366.7 MB in the beginning and 364.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 15:48:52,886 INFO L168 Benchmark]: Boogie Preprocessor took 27.18 ms. Allocated memory is still 402.7 MB. Free memory was 364.6 MB in the beginning and 363.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 15:48:52,886 INFO L168 Benchmark]: RCFGBuilder took 350.24 ms. Allocated memory is still 402.7 MB. Free memory was 363.5 MB in the beginning and 340.4 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-05-21 15:48:52,886 INFO L168 Benchmark]: TraceAbstraction took 177613.44 ms. Allocated memory was 402.7 MB in the beginning and 901.8 MB in the end (delta: 499.1 MB). Free memory was 339.4 MB in the beginning and 410.9 MB in the end (delta: -71.5 MB). Peak memory consumption was 428.7 MB. Max. memory is 16.0 GB. [2021-05-21 15:48:52,886 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 402.7 MB. Free memory was 383.0 MB in the beginning and 382.9 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 409.67 ms. Allocated memory is still 402.7 MB. Free memory was 364.2 MB in the beginning and 366.7 MB in the end (delta: -2.4 MB). Peak memory consumption was 7.3 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 41.39 ms. Allocated memory is still 402.7 MB. Free memory was 366.7 MB in the beginning and 364.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 27.18 ms. Allocated memory is still 402.7 MB. Free memory was 364.6 MB in the beginning and 363.5 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 350.24 ms. Allocated memory is still 402.7 MB. Free memory was 363.5 MB in the beginning and 340.4 MB in the end (delta: 23.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 177613.44 ms. Allocated memory was 402.7 MB in the beginning and 901.8 MB in the end (delta: 499.1 MB). Free memory was 339.4 MB in the beginning and 410.9 MB in the end (delta: -71.5 MB). Peak memory consumption was 428.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [i=3, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L716] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0, k++=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0, k++=0] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=2, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1, k++=1] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1, k++=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3, k++=2] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3, k++=2] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=3, k++=3] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4, k++=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=5] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4, k++=4] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=4, k++=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6, k++=5] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=5, k++=5] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=7, k=6] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7, k++=6] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=7, k++=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=8, k=7] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7, k++=7] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7, k++=7] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8, k++=8] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8, k++=8] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L719] 0 int condJ = j >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L721] COND TRUE 0 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 84 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 177432.0ms, OverallIterations: 196, TraceHistogramMax: 10, EmptinessCheckTime: 388.4ms, AutomataDifference: 74140.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 65.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 19018 SDtfs, 139148 SDslu, 160827 SDs, 0 SdLazy, 29302 SolverSat, 19584 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14680.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25828 GetRequests, 18012 SyntacticMatches, 0 SemanticMatches, 7816 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81623 ImplicationChecksByTransitivity, 70692.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=4093occurred in iteration=194, InterpolantAutomatonStates: 5848, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5891.9ms AutomataMinimizationTime, 195 MinimizatonAttempts, 155540 StatesRemovedByMinimization, 195 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1868.6ms SsaConstructionTime, 4599.4ms SatisfiabilityAnalysisTime, 45585.4ms InterpolantComputationTime, 36484 NumberOfCodeBlocks, 36478 NumberOfCodeBlocksAsserted, 1031 NumberOfCheckSat, 35971 ConstructedInterpolants, 0 QuantifiedInterpolants, 148579 SizeOfPredicates, 2662 NumberOfNonLiveVariables, 37888 ConjunctsInSsa, 3764 ConjunctsInUnsatCore, 383 InterpolantComputations, 7 PerfectInterpolantSequences, 34/65760 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...